Bill Gates Keynote from WinHEC 2005 - April 25th, 2005

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  - 1
    - Override kernel exception handler? In postin http://msdn.microsoft.com/newsgroups/managed/default.aspx?dg=microsoft.public.development.device.drivers&mid=74822b53-9342-4101-bbb8-b0daf2afc25b&sloc=en-us I learned that __try/__except and such can only catch a subset of all exceptions that may occur in a kernel driver. Unless we write perfect code, this will eventually come back and bite us. Is it at all possible - probably not advisable though - to override the kernel exception handler? I'd write some exception information to the disk, then reboot. Unless there is a supported way of replacing the default exception handler, would I gain anything by replacing KeBugCheck or KeTrap in memory, by a call/jump to my own exception handler? I realize this may seem far-fetched... Any input appreciated, / Hannes. Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62391
  - 2
    - Toaster Sample on Terminal Server I am trying to redirect devices from a client machine to a Terminal Server. I used the toaster sample bus driver to simulate device plugins on the Terminal Server. Everything works fine, My problem is the following. I wish that the redirected devices are only accessable by a particular session and not only from the console. 10x Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62384
  - 3
    - How to acess EFI system table Am intrested in writing wdm driver for pci express.. i require to acess RSDP structure.. Are there any Api's to check whether the system is EFI enabled or not ? Or w'd i understand whether the system is EFI enabled or not?? In Extensible Firmware Interface (EFI) enabled systems (for example, ItaniumTM-based platforms) a pointer to the RSDP structure exists within the EFI System Table. The OS loaderâ??s EFI image is provided a pointer to the EFI System Table at invocation. The OS loader must retrieve the pointer to the RSDP structure from the EFI System table and convey the pointer to OSPM, using an OS dependent data structure, as part of the hand off of control from the OS loader to the OS. The OS loader locates the pointer to the RSDP structure by examining the EFI configuration table within the EFI system table. Any suggestion about EFI & windows driver is appreciated.. -- Vijay PIC ,Bangalore Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62382
  - 4
    - Debugging Help Hi, I am trying to debug a NDIS Miniport driver. I have setup both Target and Host machines connected through NULL modem. I have tested null moded using Hyper Terminal. On the Host machine I am running WinDbg with Kernet Debugging on and it gives the message "Waiting for connection ........". On the Target machine I have changed the boot.ini to include my port settings. Now the problem is that most of the time it does not work. Nothing is displayed on the WinDbg command window on Host machine. But sometimes it do work and I can see the output. I tied rebooting the Target machine, but nothing happens. Sometimes when I press CTRL+C on the Host machine, my Target machine hangs. Any ideas, why this random behaviour is happening???? JS Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62381
  - 5
    - Getting display information through DDC Can anyone here point me to some examples (preferrable including code) of how to retrieve display information through DDC? Since DDC calls happen in RTM, they are not supposed to be allowed in Windows protected mode as I understand it. People say, it is necessary to create a driver for this. I would need an example of how to do this, since I am not exactly a driver expert ;-) Any help would be much appreciated! Best Regards, Christian. Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62380
  - 6
    - IoCompleteRequest query In a driver i forgot calling IoCompleteRequest for read/write from user mode. still everyting worked fine. how did this happen. who completed the irp. ...Mani Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62373
  - 7
    - FSCTL_REQUEST_BATCH_OPLOCK What is the function of this command ? When and How to use it? thanks for your advices. zengfeng. Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62370
  - 8
    - a sequenced, singly linked list Hi, What's the point of the SLIST_HEADER.Sequence member? Treiber's non-blocking stack algorithm does not use it TIA Andrew Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62368
  - 9
    - Discovering NDIS miniport internals Hi, I am interested in one question. I read (and then even saw) that some NDIS miniports have (e.g.) firmware image inside. How is it managed (and accessed)? Is such "image file" part of its resources (*.rc)? Thank for kindness MF Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62364
  - 10
    - scsi miniport dma data corruption Dear all, I have PCI controller that has DMA channel 0/1 for data transmission, the flow of dma command issued by scsi miniport was just set DMA control register, everything is ok, but sometimes the buffer content of scsi miniport read from PCI memory was not the expected data, it may lost 1 or 2 word byte, I have tried PCI controller function in real mode (DOS), and the result was as expected. After rescan DDK document, I found that DMA cache or cachebuffer may cause this problem. Can somebody tell me that direction was right or this situation comes from other source? Any suggestions was appriciate! Best Regards, Tony Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62353
  - 11
    - ZwCreateFile question I know that files I'm interested in are open for write access of some sort. I'd like to open those files but merely for read access prior to a write, so I open it like so: InitializeObjectAttributes(&ObjAttrs,InFile,OBJ_KERNEL_HANDLE|OBJ_CASE_INSENSITIVE,NULL,NULL); // Status = ZwCreateFile(&FileHandle, GENERIC_READ|FILE_READ_ATTRIBUTES|FILE_READ_DATA, &ObjAttrs, &StatusBlock, 0, //allocation size FILE_ATTRIBUTE_NORMAL, FILE_SHARE_READ|FILE_SHARE_DELETE, //share access FILE_OPEN, // disposition FILE_NON_DIRECTORY_FILE|FILE_SYNCHRONOUS_IO_NONALERT,//CreateOptions, 0, // EaBuffer OPTIONAL, 0 ); Yet, I'm getting : STATUS_SHARING_VIOLATION ((NTSTATUS)0xC0000043L) errors. Must I open the file with precisely the same ACCESS_MASK as was originally used? On the other hand, I do have the FileObject for this guy based on it being open for Write. Can I get a handle for reading with ObOpenObjectByPointer? -- Gak - Finecats Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62351
  - 12
    - USB 2.0 High speed Isochronous Hi, I'm deveoping a driver using USBCAMD2 for an FX2 Cypress device. In USB 2.0 Isochronous High-Speed mode I transfer a stream about at 7.8 MB/s. This is correct if you set 1024 byte per Microframe with 125us interval. My problem is that I want to transfer 3*1024 bytes every Microframe with 125us interval to reach about 23 MB/s. I know this is theoretically possible with USB 2.0, but I don't know how to program my driver to increase transfer rate. My Endpoint descriptor is : bmAttributes = 0x01 (Isochronous) wMaxPacketSize = 0x1400 (3*1024) bInterval = 0x01 (125 us) How can I transfer about 23MB/s with USB in Isochronous mode ? Thank a lot, Blu. Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62349
  - 13
    - DIFxApp 2.0 won't install my driver - it doesn't think it's signed I thought I had this DIFxApp thing under control, but I just upgraded to version 2.0 that was just released (I need the x64 support) and it seems to have broken something. The install now aborts with the following log: DIFXAPP: InstallDriverPackages DIFXAPP: 'CustomActionData' property 'DIFxApp Version' is 2.0. DIFXAPP: 'CustomActionData' property 'UI Level' is 5. DIFXAPP: 'CustomActionData' property 'componentId' is {33C87C1F-F8A4-4834-9F3D-A9026D067632}. DIFXAPP: 'CustomActionData' property 'componentPath' is C:\Program Files\company driver\Kernel_MF\. DIFXAPP: 'CustomActionData' property 'flags' is 0x10. DIFXAPP: 'CustomActionData' property 'installState' is 2. DIFXAPP: 'CustomActionData' property 'ProductName' is driver. DIFXAPP: 'CustomActionData' property 'ManufacturerName' is FBN Corporation. DIFXAPP: INFO: ENTER: DriverPackageInstallW DIFXAPP: INFO: Checking signature with catalog 'C:\Program Files\company driver\Kernel_MF\driver.cat' ... DIFXAPP: ERROR: Signature verification failed while checking integrity of driver package 'driver.inf' ('C:\Program Files\company driver\Kernel_MF\driver.inf'). (Error code 0xE0000244.) DIFXAPP: INFO: Successfully removed {33C87C1F-F8A4-4834-9F3D-A9026D067632} from reference list of driver store entry DIFXAPP: INFO: RETURN: DriverPackageInstallW (0xE0000244) DIFXAPP: ERROR encountered while installing driver package C:\Program Files\company driver\Kernel_MF\driver.inf DIFXAPP: InstallDriverPackages failed with error 0xE0000244 Action ended 7:46:31: InstallFinalize. Return value 3. The driver is signed. If I use chktrust on the .cat file it reports that it is properly signed. Is there any other utility that would be more appropriate to use? My only clue here is that maybe there is a file that is not included in the signature that should be, or there is a file that is included that shouldn't be. How can I determine the problem? My driver consists of a single .sys file. I also include a stripped .pdb file. That means my .cdf file that creates the .cat file looks like: [CatalogHeader] name=driver.cat [CatalogFiles] driversys=driver.sys driverinf=driver.inf driverpdb=driver.pdb I then sign the .cat file. The .inf file has an entry that points to the cat file: [Version] Signature = "$Windows NT$" Class = "Replication" Provider = %Company% DriverVer = 01/01/05,0.0.0.0 CatalogFile = driver.cat DriverPackageType=FileSystemMinifilter DriverPackageDisplayName=%DriverServiceDesc% Any help or any idea on what to look for would be greatly appreciated! This worked in DIFxApp 1.1!!! Thanks! Bob Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62347
  - 14
    - Shell Namespace vs. Device Driver Hi, A short time ago, I asked a question in this newsgroup about writing a device driver. It is: -- Hi, I would like to write a program: In Windows Explorer, after drag&drop a file to a pre-defined drive letter (for example F:) the file should be sent through the COM port to an external device(digital satellite receiver). Where should I start? Do I have to write a device driver? -- I was told that writing a device driver is not neccessary and a Shell Namespace Extension with a drag&drop handler can do the job. I had a short look at MSDN about Creating a Shell Namespace Extension. Now, I'm asking my question more clearly. My scenario is: As soon as the user attaches the RS-232 cable to the computer (at the other end it is attached to the RS-232 port present on the external device) a drive letter F: should appear in Windows Explorer automaticly(like in digital cameras) and when the user drag&drops a file to F: the file should be sent through the COM port to the external device. So, can Shell Namespace Extension provide what I need? I'm going to execute my program with Shell Namespace Extension only once, then restart the computer. Now, may I expect to see the drive letter F: in Windows Explorer if I attach the RS-232 cable to the computer? Will it disappear if I detach the cable? About the other case (displaying the drive letter F: automaticly is not necessary, it may always be visible, it will not be influenced from attaching and detaching the cable): I'll execute my program with Shell Namespace Extension. I'll see the drive letter F: in Windows Explorer, then I can transfer the file to the external device. What will happen if I restart the computer? Will the drive letter F: remain in Windows Explorer? Thanks... Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62344
  - 15
    - [Need info] Driver Signing Hi, What is the process to pass Windows Logo testing for a driver ? What is this cost ? How many time does it take ? Thanks Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62334
  - 16
    - "CreateCompatibleDC ()" may have a bug on XP x64 OS: Windows XP x64 Application: 32-bit application (i.e. Word) Priner Driver: 64-bit printer driver DDK version: 3790.1433 "CreateCompatibleDC (NULL);" returns NULL inside our 64-bit printer driver when our driver is called by a 32-bit application. And "GetLastError()" returns 0 after that. Is that a known issue? If so, when can we expect to get the new OS or DDK version with the fix? Thanks, SL Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62332
  - 17
    - problem with NdisReturnPackets ( ) Hello, All! I get BSOD on vmware 5.0 and some other networc cards. It does not happen on other vmware versions and physical NICs. The problem appears when I try to send previously queued packed. The same(?) packets are sent before BSOD using the same functions, pools, etc without problems. On Windows 2000 Pro, mydriver rises D2 bugcheck somewhere in ethFilterDprIndicateReceivePacket (instead of D1 one in XPsp2 system, see below). Does anybody know why this may happen? According to http://pcausa.com/support/KB05050101.htm I use separate pools for send and receive packets. Also, I tried to zero Packet->MacReserved field. No luck. Any thoughts about this would be greatly appreciated. Best regards, Serge. ############################################################################ ######### *** Fatal System Error: 0x000000d1 (0x00000008,0x00000002,0x00000000,0xF9889848) Break instruction exception - code 80000003 (first chance) A fatal system error has occurred. Debugger entered on first try; Bugcheck callbacks have not been invoked. A fatal system error has occurred. Connected to Windows XP 2600 x86 compatible target, ptr64 FALSE Loading Kernel Symbols ................................................................... Loading unloaded module list ... Loading User Symbols **************************************************************************** *** * * * Bugcheck Analysis * * * **************************************************************************** *** Use !analyze -v to get detailed debugging information. BugCheck D1, {8, 2, 0, f9889848} Probably caused by : mydriver.sys ( mydriver!MPReturnPacket+73 ) Followup: MachineOwner --------- nt!RtlpBreakWithStatusInstruction: 804e3b25 cc int 3 kd> !analyze -v **************************************************************************** *** * * * Bugcheck Analysis * * * **************************************************************************** *** DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1) An attempt was made to access a pageable (or completely invalid) address at an interrupt request level (IRQL) that is too high. This is usually caused by drivers using improper addresses. If kernel debugger is available get stack backtrace. Arguments: Arg1: 00000008, memory referenced Arg2: 00000002, IRQL Arg3: 00000000, value 0 = read operation, 1 = write operation Arg4: f9889848, address which referenced memory Debugging Details: ------------------ READ_ADDRESS: 00000008 CURRENT_IRQL: 2 FAULTING_IP: NDIS!NdisReturnPackets+48 f9889848 8b7308 mov esi,[ebx+0x8] DEFAULT_BUCKET_ID: DRIVER_FAULT BUGCHECK_STR: 0xD1 LAST_CONTROL_TRANSFER: from f975f58f to f9889848 TRAP_FRAME: f9f028ec -- (.trap fffffffff9f028ec) ErrCode = 00000000 eax=ffffffff ebx=00000000 ecx=00000002 edx=00000002 esi=81664518 edi=81669f30 eip=f9889848 esp=f9f02960 ebp=f9f02978 iopl=0 nv up ei pl zr na po nc cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00010246 NDIS!NdisReturnPackets+0x48: f9889848 8b7308 mov esi,[ebx+0x8] Resetting default scope STACK_TEXT: f9f02978 f975f58f f9f02998 00000001 817b1f30 NDIS!NdisReturnPackets+0x48 f9f029b4 f988987f 815ba3a0 817b1f30 81558280 mydriver!MPReturnPacket+0x73 [C:\Work\Driver\NDIS\miniport.c @ 598] f9f029dc f9755061 f9f02a00 00000001 817b1f78 NDIS!NdisReturnPackets+0xe9 f9f029f4 f9896d09 815ac140 817b1f30 f975ab40 psched!MpReturnPacket+0x3b f9f02a48 f975501d 00029d70 81685be0 00000001 NDIS!ethFilterDprIndicateReceivePacket+0x56d f9f02a5c f97551b4 81558280 81685be0 00000001 psched!PsFlushReceiveQueue+0x15 f9f02a80 f97555f9 815ac148 00000000 81558280 psched!PsEnqueueReceivePacket+0xda f9f02a98 f9896d40 815ac140 00000000 816b1120 psched!ClReceiveComplete+0x13 f9f02ae8 f9761fb4 00029d70 f9f02b08 00000001 NDIS!ethFilterDprIndicateReceivePacket+0x5a4 f9f02c60 f976ab31 815ba3a0 817b1f30 00000001 mydriver!PtReceivePacketEx+0x119 [C:\Work\Driver\NDIS\protocol.c @ 745] f9f02ca0 f976ae93 815ba3a0 817b1f30 00000002 mydriver!Queue_Packet_ExecuteEx+0x85 [C:\Work\Driver\NDIS\queue_packet.c @ 239] f9f02cd8 f976b453 815ba3a0 81027720 00000000 mydriver!Queue_Packet_Execute_Item+0xef [C:\Work\Driver\NDIS\queue_packet.c @ 270] f9f02d30 f976b6fa 815ba3a0 81027720 00000000 mydriver!Queue_Packet_Execute+0x7b [C:\Work\Driver\NDIS\queue_packet.c @ 331] f9f02d74 f976bdd5 815ba3a0 00000000 816b1120 mydriver!Queue_Packet_Manage+0xa6 [C:\Work\Driver\NDIS\queue_packet.c @ 396] f9f02dac 8057dfed 815ba3a0 00000000 00000000 mydriver!Queue_Packet_Thread+0xa5 [C:\Work\Driver\NDIS\queue_packet.c @ 505] f9f02ddc 804fa477 f976bd30 815ba3a0 00000000 nt!PspSystemThreadStartup+0x34 00000000 00000000 00000000 00000000 00000000 nt!KiThreadStartup+0x16 FOLLOWUP_IP: mydriver!MPReturnPacket+73 [C:\Work\Driver\NDIS\miniport.c @ 598] f975f58f eb0d jmp mydriver!MPReturnPacket+0x82 (f975f59e) SYMBOL_STACK_INDEX: 1 FOLLOWUP_NAME: MachineOwner SYMBOL_NAME: mydriver!MPReturnPacket+73 MODULE_NAME: mydriver IMAGE_NAME: mydriver.sys DEBUG_FLR_IMAGE_TIMESTAMP: 42695faa STACK_COMMAND: .trap fffffffff9f028ec ; kb BUCKET_ID: 0xD1_mydriver!MPReturnPacket+73 Followup: MachineOwner --------- ############################################################################ ######### kd> !ndiskd.pkt 0x81669f30 4 NDIS_PACKET at 81669f30 NDIS_BUFFER at 81606120 Next 00000000 Size 20 MdlFlags c Process 00000000 MappedSystemVa 814d3000 Start VA 814d3000 ByteCount 5ea ByteOffset 0 MacReserved[]: 00000000 00000000 00000000 00000000 0. TcpIpChecksumPacketInfo = 00000000 1. IpSecPacketInfo = 00000000 2. TcpLargeSendPacketInfo = 00000000 3. ClassificationHandlePacketInfo = 00000000 4. NdisReserved = 0000000e 5. ScatterGatherListPacketInfo = 00000000 6. Ieee8021QInfo = 00000000 7. OriginalPacketInfo = 00000103 8. PacketCancelId = 00000000 9. OriginalNetBufferList = 00000000 10. CachedNetBufferList = 00000000 11. MaxPerPacketInfo = 00000000 Packet.Private PhysicalCount 00000000 Total Length 00000000 Head 00000000 Tail 00000000 Pool 00000000 Count 00000000 Flags 00000000 ValidCounts 00 NdisPacketFlags 00000000 NdisPacketOobOffset 0000 Private.Flags : 00000000 Private.NdisPacketFlags: 80 fPACKET_ALLOCATED_BY_NDIS, ############################################################################ ######### kd> !ndiskd.pkt 0x81669f30 5 NDIS_PACKET at 81669f30 MDL = 81606120 StartVa ffffffff814d3000, ByteCount 0x5ea, ByteOffset 0x0, NB MdlOffset 0x0 814d3000: 00 0c 29 5e 75 ca 00 50 56 c0 00 01 08 06 00 01 814d3010: 08 00 06 04 00 02 00 50 56 c0 00 01 0a 01 00 01 814d3020: 00 0c 29 5e 75 ca 0a 01 00 07 00 00 00 00 00 00 814d3030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [zeros skipped] 814d35c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 814d35d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 814d35e0: 00 00 00 00 00 00 00 00 00 00 Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62331
  - 18
    - Device driver programmers in SLC ? I am new to device drivers. Are there any device driver developers in the Salt Lake City, Utah area that I may be able to chatt with? Thanks, John Long john@thelongs.us Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62330
  - 19
    - SetPort (printer driver language monitor) Hi all, I wish the SDK explained the SetPort function better. I'm not really sure what it does other than change the "Status" messages column in the "Printers and Faxes" dialog box. Does it do anything else? I've discovered if I use PORT_STATUS_TYPE_ERROR for dwSeverity that it does seem to hang up the spooler, and I can't seem to clear it later. Thats ok, because I found that PORT_STATUS_TYPE_WARNING is ok for my use. My real question is that I would like to use the pszStatus member of PORT_INFO_3 to display my own messages up there, but it doesn't seem to do anything. The SDK says that if the predefined messages available for dwStatus aren't enough that you can define your own with pszStatus. So, this is what I do: PORT_INFO_3 pi3; pi3.dwStatus = 0; // set to zero because none of these messages apply. pi3.pszStatus = TEXT("My Printer Message"); pi3.dwSeverity = PORT_STATUS_TYPE_WARNING; SetPort(NULL,pPortName,3,LPBYTE(&pi3)); Does anybody have any ideas? Thanks! Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62328
  - 20
    - try/except does not catch all exceptions...? I am trying to use __try/__except to catch crashes that may occur in my driver. It works great for NULL pointer access, but not for a plain bad memory access. If the driver accesses 0xfefefefe (just as a test!), I see a crash in WinDbg, instead of my exception handler getting launched. The crash is below. How do I catch it (and other exceptions) ? PAGE_FAULT_IN_NONPAGED_AREA (50) Invalid system memory was referenced. This cannot be protected by try-except, it must be protected by a Probe. Typically the address is just plain bad or it is pointing at freed memory. Arguments: Arg1: fefefefe, memory referenced. Arg2: 00000000, value 0 = read operation, 1 = write operation. Arg3: b94ca75d, If non-zero, the instruction address which referenced the bad memory address. Arg4: 00000000, (reserved) / Hannes. Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62321
  - 21
    - INF model section decoration 64-bit Windows2003 AMD64 Hi, I am trying to install 64bit printer driver thru. HW1st on beta version of 64-bit Windows2003 build 3790 v.1433 installed on AMD64 machine. Getting an error "can not Install hardware unable to detect device ID". In printer INF file, I have described the decorated model section for windows2003 in following way. [MANUFACTURER] %ABC%=Models,NTamd64.5.2 // Here 5 is MajorOSversion and 2 is MinorOSVersion [Models.NTamd64.5.2] I have also tried with following model section [Models.NTamd64] Still giving the same error "can not Install hardware" on 64-bit Windows2003. Same model decoration is working fine on 64-bit WindowsXP. When I turnoff the undecorated models check by setting registry variable DisableDecoratedModelsRequirement to 1 then 64-bit printer driver gets installed on 64-bit windows 2003. So, I think problem is with model decoratation for 64-bit windows2003. Can anyone tell me what should be the model decoration for 64-bit Windows2003. thanks in advance regards manoj Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62315
  - 22
    - Ndis - DHCP Hi All, I am making use of netvmini sample(Virtual miniport driver). I have modified the code in such a way that i can change the cable status using control codes which will trigger a NDIS_MEDIA_STATUS_CONNECT and NDIS_MEDIA_STATUS_DISCONNECT in driver. It is working fine. But sometimes though adapter is configured to use static IP, on receiving CONNECT control code which will trigger NDIS_MEDIA_STATUS_CONNECT, the status in the network connections window says "Acquiring network address" . The ip address displayed is 0.0.0.0 but soon after the status becomes connected and it chages back to static IP which i configured . What i observed is this happens with LAN as well as WLAN in my machine when they are configured with static IP. When i unplug and plug network cable of LAN adapter, the same event happens sometimes which results in erratic behavior of sockets. Could anyone let me know how can i fix this?Would be of great help if u could let me know what all are the events happens at "Acquiring network address". Thanks, Senthil Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62309
  - 23
    - Disk class filter driver for back-up mechanism Hi All, I am trying to develop a backup tool. To give the maximum performance, my plan is to write only modified blocks/sectors of source disk into target disk since it was last backed up. How I can collect block/sector information from data write request packet. Can a disk class upper filter solve this problem. Your ideas are welcome regards John Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62308
  - 24
    - Will XP/2k load my driver(oemxx.inf) prior to system-supplied keyboard.inf (HID_DEVICE)? I have a HID DEVICE with 2 function on it - keyboard and mouse compisited chip. I only use the keyboard function and my driver is simply a keyboard filter. When I plug DEVICE into system without my filter driver, system treat it as a HID_KEYBOARD and HID_MOUSE. the question is: 1. If I have a valid .cat file, after perform SetupCopyOEMInf, will XP/2000 load my driver(oemxx.inf) prior to system-supplied keyboard.inf (HID_DEVICE)? ( as I know before have .cat file - won't!) I am very worry about the 'Rank' (to match an best .inf) will larger than keyboard.inf, that's mean my filter driver will never been chosen. Here 's my attachment information, thanks for your comments. Assume the pid/vid is: vid = 1234 pid = 5678 The HardwareId (retrieve from actual devnode): HID\Vid_1234&Pid_5678&Rev_0100&MI_00 HID\Vid_1234&Pid_5678&MI_00 HID_DEVICE_SYSTEM_KEYBOARD (I think it's create by HIDClass) HID_DEVICE_UP:0001_U:0006 HID_DEVICE The .Inf file (simply kbfiltr version): //-------------------------------------------------------------------------------------------- ; Hid device filtr.inf ; ; Installation inf for the Device that needs filtering adapter. ; [Version] Signature="$Windows NT$" Provider=%DDK_Ex% ClassGUID={4D36E96B-E325-11CE-BFC1-08002BE10318} Class=Keyboard ;CatalogFile=Flagfiltr.cat - I am trying to obtain one from WHQL... DriverVer=01/01/2005, 1.0.0.0 [DestinationDirs] DefaultDestDir = 12 [ControlFlags] ExcludeFromSelect = HID\Vid_1234&Pid_5678&Rev_0100&MI_00 ExcludeFromSelect = HID\Vid_1234&Pid_5678&MI_00 ; Driver information ; [Manufacturer] %DDK_Ex% = DDK_Ex.Mfg [DDK_Ex.Mfg] "TEST_1" = Flagfiltr, HID\Vid_1234&Pid_5678&Rev_0100&MI_00 "TEST_2" = Flagfiltr, HID\Vid_1234&Pid_5678&MI_00 ; ; General installation section ; [Flagfiltr.NT] ; perform port related actions from keyboard.inf Include=keyboard.inf Needs= ; Copy the driver over CopyFiles=Flagfiltr.CopyFiles.NT ; ; File sections ; [Flagfiltr.CopyFiles.NT] Flagfiltr.sys ; ; Service Installation ; [Flagfiltr.NT.Services] AddService = Flagfiltr, , Flagfiltr_Service_Inst ; Install the port driver and mouclass from keyboard.inf Include=keyboard.inf Needs= [Flagfiltr_Service_Inst] DisplayName = %Flagfiltr.SvcDesc% ServiceType = 1 ; SERVICE_KERNEL_DRIVER StartType = 3 ; SERVICE_DEMAND_START ErrorControl = 0 ; SERVICE_ERROR_IGNORE LoadOrderGroup = Keyboard Port ServiceBinary = %12%\Flagfiltr.sys [Flagfiltr.NT.HW] ; Add the device upper filter AddReg = Flagfiltr.NT.HW.AddReg ; run the directives need by the port driver Include=keyboard.inf Needs= [Flagfiltr.NT.HW.AddReg] HKR,,"UpperFilters",0x00010000,"Flagfiltr" ; ; Source file information ; ; use [SourceDisksNames.x86] for x86 only installs ; use [SourceDisksNames.alpha] for alpha only installs [SourceDisksNames] 1 = %DiskId1%,,, [SourceDisksFiles] Flagfiltr.sys = 1,, [Strings] ; ; Non-Localizable Strings ; REG_SZ = 0x00000000 REG_MULTI_SZ = 0x00010000 REG_EXPAND_SZ = 0x00020000 REG_BINARY = 0x00000001 REG_DWORD = 0x00010001 SERVICEROOT = "System\CurrentControlSet\Services" ; ; Localizable Strings ; DiskId1 = "TEST" DDK_Ex = "TEST" Flagfiltr.SvcDesc= "TEST" Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62306
  - 25
    - Link between setup classes and interface classes. Dear All, I would like to communicate directly with USB and parallel local printers using CreateFile, WriteFile and ReadFile functions from the Windows API. To retrieve local printers connected to a PC, I used the setupapi with the printer setup class as follow : SetupDiGetClassDevs(&GUID_DEVCLASS_PRINTER, 0, 0, DIGCF_PRESENT); Then I could enumerate the printers using SetupDiEnumDeviceInfo (). To communicate with the printers using CreateFile, WriteFile and ReadFile functions, I figured out I had to retrieve the "symbolic name" of the printers using SetupDiGetDeviceInterfaceDetail (). How can I get the device interfaces of the printers I retrieved using SetupDiEnumDeviceInfo () ? What is the link between setup class and interface class ? Best regards, Guillaume. Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62304
- Next
  - 1
    - How to completely remove AVSSAMP from windows ? first, i run script to see avssamp device in device manager applet set devmgr_show_nonpresent_devices=1 cd\%SystemRoot%\System32 start devmgmt.msc then i success use uninstall. now it'is removed. but after the few minutes, window find again this device and asks me about how to install in, like: Found new MEDIA... Why it asks me again and again ? Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62302
  - 2
    - Get service pack name from a driver? Hi, From within a driver, I want to get the string name of the service pack, e.g. "Service Pack 1, v.1247" The function PsGetVersion() is supposed to do the trick, but I can't get a string out of it, neither from within DriverEntry, nor any other point in my driver. (I do get other version info from PsGetVersion() though, but not the SP name.) Is there any other way to get the service pack name string from within a driver? Thanks, / Hannes. Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62291
  - 3
    - Application can't be killed while on a synchronous read I wrote a driver that is not allowing a console application which is blocked on a synchronous ReadFile() to be killed (ctrl-C or taskmanager). Nor can I remove the driver with out rebooting the system. What am I doing wrong -- details below. I have created a pure software driver that reads and writes from an internal buffer. If data is available the read IRP it will complete immedately, else it will PEND. A Device I/O Control is used to indicate that data is available, and if a read IRP is pending will complete it. I have tested with a TestRead.exe that syncrhonously reads the device and a TestRelease program that writes and sends the IOCTL_RELEASE_READ. Things work fine with the test program interaction, immediately reading or blocking until data is availalbe. HOWEVER, when I run the TestRead and it blocks I can not Ctrl-C the program or use the TaskManager to kill the program. Why is this? I understood that the I/O Manager was support to clean all the synchronous calls/Reads and allow exit of the program, but this is not happening. What am I missing? Below are what I believe to be the critical pieces: NTSTATUS DispatchRead (IN PDEVICE_OBJECT pDevObj, IN PIRP pIrp) { NTSTATUS status = STATUS_SUCCESS; [ declarations ...] PDEVICE_EXTENSION pDevExt = (PDEVICE_EXTENSION) pDevObj->DeviceExtension; if (pDevExt->bDataReady) { [fill read buffer ...] // Now complete the IRP pIrp->IoStatus.Status = status; pIrp->IoStatus.Information = nBytes; // bytes xfered IoCompleteRequest( pIrp, IO_NO_INCREMENT ); return status; } else { pDevExt->pIrpPendingRead = pIrp; // save pointer to IRP status = STATUS_PENDING; IoMarkIrpPending(pIrp); pIrp->IoStatus.Status = status; pIrp->IoStatus.Information = 0; // bytes xfered return status; } } NTSTATUS DispatchIoControl(IN PDEVICE_OBJECT pDevObj, IN PIRP pIrp ) { PIO_STACK_LOCATION pIrpStack = IoGetCurrentIrpStackLocation( pIrp ); PDEVICE_EXTENSION pDevExt = (PDEVICE_EXTENSION) pDevObj->DeviceExtension; // Release read is send when data is available if (pIrpStack->Parameters.DeviceIoControl.IoControlCode == IOCTL_RELEASE_READ ) { if (pDevExt->pIrpPendingRead == NULL) { pDevExt->bDataReady = TRUE } else { // The stack location contains the user buffer info PIO_STACK_LOCATION pPendingIrpStack = IoGetCurrentIrpStackLocation( pDevExt->pIrpPendingRead ); [decls and read Irp buffer copy stuff ...] // Complete Pending Read IRP pDevExt->pIrpPendingRead->IoStatus.Information = nBytes; pDevExt->pIrpPendingRead->IoStatus.Status = STATUS_SUCCESS; IoCompleteRequest( pDevExt->pIrpPendingRead, IO_NO_INCREMENT ); pDevExt->pIrpPendingRead = NULL; // "remove from queue of one" } // Complete Device IO Irp pIrp->IoStatus.Information = pDevExt->bSetPendingRead; pIrp->IoStatus.Status = STATUS_SUCCESS; IoCompleteRequest( pIrp, IO_NO_INCREMENT ); return STATUS_SUCCESS; } else { [ not implemented completion of IRP ...] return status; } } Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62284
  - 4
    - question on USB pipe flags Hello. My device is USB composite (1.1), and the interface I am working on is for ASIO (audio) streaming. I have two questions for USB pipe flags: a) What do USBD_PF_ENABLE_RT_THREAD_ACCESS and USBD_PF_MAP_ADD_TRANSFERS actually do? The DDK says that the former is enables optimization for streaming transfers while the latter enables "fast isochronous mode". Can anyone shed light on what these actually do? b) Since I have a composite device, I use URB_FUNCTION_SELECT_INTERFACE instead of URB_FUNCTION_SELECT_CONFIGURATION to allocate bandwidth and receive my pipes. However, the DDK implies that the aforementioned flags (see above) work for URB_FUNCTION_SELECT_CONFIGURATION. Does this mean that they are inaccessible to me, as I am forced to use these flags in my URB_FUNCTION_SELECT_INTERFACE request? thanks, Philip Lukidis Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62281
  - 5
    - *InputDataConsumed always = 0 (moufiltr) Hi everyone, I found that in MouFilter_ServiceCallback the input data always contain one packet (InputDataStart + 1 = InputDataEnd) but *InputDataConsumed always = 0 (I don't know if this parameter is used by any other driver, eg. mouclass). Can anyone explain this? Thanks in advance. Liang Fu Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62280
  - 6
    - DrvTextOut Font Outlines Hi, I am trying to write a printer driver that saves the output data in vector format in a file. When dealing with TrueType fonts the gdi calls the DrvTextOut function but with bitmap glyphs. I want to get outlines of the characters instead. I have set the following for the various related paramters: DrvDeviceCapabilities: DC_TRUETYPE - returns 0 DEVMODE: dmTTOption = DMTT_DOWNLOAD_OUTLINE DEVINFO: flGraphicsCaps = GCAPS_ALTERNATEFILL | GCAPS_HORIZSTRIKE | GCAPS_VERTSTRIKE | GCAPS_VECTORFONT | GCAPS_FONT_RASTERIZER | GCAPS_GEOMETRICWIDE | GCAPS_HALFTONE | GCAPS_OPAQUERECT GCAPS_GRAY16; GDIINFO: ulTechnology = DT_RASPRINTER; Is there some specific setting that forces the GDI to always send font outlines or is it just not possible in some cases? Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62278
  - 7
    - Audio Delay From Audio Capture Source Filter Dear All: I designed a AVstream driver with video and audio streams. Then, using the graphedit to play and capture it. The audio stream is offered from Audio Capture Source (qcap.dll). The video stream is offered from Video Capture Source filter's capture pin. However, the audio sound has a serious dealy (about 1 ~ 2 sec) to video in previewing. But, its captured avi file is AV-Sync well. This is my driver's bug? I had tried other video devices (USB2.0 Video Grabber). Their preview and capture are AV-Sync both. The USB device is a standard USB Audio Class device. It uses Microsoft's USBAUDIO.sys driver. Why cannot MS's driver cause the preview delay? Best Regards, H.P. Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62277
  - 8
    - Does WinDBG follow into SEH finally{}? Hello, when I debug my driver and something went wrong, I can't see (with WinDBG) that the code inside finally{} is executed. AFAIK the code inside finally is _always_ executed, so I assume that WinDBG isn't following. Is this true? Thank you for your efforts! -- phren Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62268
  - 9
    - Audio formats supported by UsbAudio.sys? Is there a listing somewhere with the formats supported by UsbAudio.sys in Windows 2000 and XP? Leo Havmøller. Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62267
  - 10
    - MUX driver Virtual Interfaces appear as Network Cable Unplugged hi all, I was creating Virtual Adapters following the MUX Sample. I am using INetCfg interfaces to Install (INetCfgClass->Install) function using my own application instead of using the notify objects as in sample. The problem is that network interfaces do appear in the Network Connection Interfaces but they all appear as Unplugged, but with the sample when i create the new virtual adapter they all are normal and are connected. I am not able to understand the problem. Is the binding to the lower adapter not happening properly ?? Can somebody explain ? Thanks in advance. Regards Tarun Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62265
  - 11
    - How to use DbgPrompt in drivers? Dear All, Recently I read the article "Try This -- Interactive Driver Testing" (The NT Inside, Vol 11). It introduces a minimal driver skeleton. I tried to build the code, but encountered a compiler error. The code uses the function "DbgPrompt". But there is no declaration of DbgPrompt in any *.h files in Win DDK (2600). And there is no information about this function in DDK's help. I have noted that the function is exported by ntoskrnl.lib. So I added "TARGETLIBS=$(DDK_LIB_PATH)\ntoskrnl.lib" in "source" file. But I still need to know the declaration of the function "DbgPrompt". Can anyone tell me about this or how to use "DbgPrompt" in drivers. Thanks in advance. Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62264
  - 12
    - STATUS_REPARSE across network share Hello Everybody, I have a filter driver that uses STATUS_REPARSE to redirect file opens in its IRP_MJ_CREATE routine as documented in this list and many other places (http://support.microsoft.com/default.aspx?scid=kb;en-us;319447). The actual files reside on a network share (e.g. reparsed to \device\mup\server\share). This technique works well for IO requests originating from the local system however if the request comes across the network (e.g. via SRV) it fails with 'access denied'. This is obviuosly becasue the access request is in the context of the system. My question is this: is it possible to make this work using impersonation or delegation, or do I need an etirely different approach to the problem? Thanks in advance for any help or advice, zengfeng. Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62260
  - 13
    - Get temperature values from the cpu/motherboard How can I get temperature values from the CPU and motherboard of a machine? I've try querying WMI (using IWbem_ methods with win32_temperatureprobe), which hasn't worked - it says the temperature sensors don't exist. Is there some other way I can get this data? Note: project also requires getting CPU usage info, which I've already done through WMI, so a WMI solution to getting the temperature values is preferable, but not necessary. Thanks! Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62254
  - 14
    - WDM capture driver and MPEG-2 video. I am trying to configure the capture Pin format on the WDM capture driver to support MPEG2_Video. We already have the stuff working for a Program stream, but we want to try out something using Mpeg2_Video for testing purposes. I have tried something as I have shown below, but somehow the capture spin of the driver doesnt connect to any downstream decoder filter when I set for MPEG2_Video format. Is there something that I could be doing wrong ? Here is the way I am configuring the KS_DATARANGE_MPEG2_VIDEO required in this case. Any help is appreciated. static KS_DATARANGE_MPEG2_VIDEO Mpeg2Stream = { //KSDATARANGE { sizeof(KS_DATARANGE_MPEG2_VIDEO) + sizeof(SequenceHeader) - 1, 0, 0, 0, STATIC_KSDATAFORMAT_TYPE_VIDEO, STATIC_KSDATAFORMAT_SUBTYPE_MPEG2_VIDEO, STATIC_KSDATAFORMAT_SPECIFIER_MPEG2_VIDEO }, TRUE, 0, 0, 0, // _KS_VIDEO_STREAM_CONFIG_CAPS { STATIC_KSDATAFORMAT_SPECIFIER_MPEG2_VIDEO, // GUID KS_AnalogVideo_None, // AnalogVideoStandard 720,480, // InputSize, (the inherent size of the incoming signal // with every digitized pixel unique) 160,120, // MinCroppingSize, smallest rcSrc cropping rect allowed 720,480, // MaxCroppingSize, largest rcSrc cropping rect allowed 8, // CropGranularityX, granularity of cropping size 1, // CropGranularityY 8, // CropAlignX, alignment of cropping rect 1, // CropAlignY; 160, 120, // MinOutputSize, smallest bitmap stream can produce 720, 480, // MaxOutputSize, largest bitmap stream can produce 8, // OutputGranularityX, granularity of output bitmap size 1, // OutputGranularityY; 0, // StretchTapsX (0 no stretch, 1 pix dup, 2 interp...) 0, // StretchTapsY 0, // ShrinkTapsX 0, // ShrinkTapsY 333667, // MinFrameInterval, 100 nS units 640000000, // MaxFrameInterval, 100 nS units 8 * 3 * 30 * 160 * 120, // MinBitsPerSecond; 8 * 3 * 30 * 720 * 480 // MaxBitsPerSecond; }, //KS_MPEGVIDEOINFO2 { //KS_VIDEOINFOHEADER2 { 0, 0, 720, 480, 0, 0, 0, 0, 0x003d0900, 0, 0x0000000000051763, 0, 0, 4, 3, 0, 0, { sizeof (KS_BITMAPINFOHEADER), // DWORD biSize; 0x000002d0, 0x000001e0, 0, 0, 0, 0, 0x000007d0, 0x0000cf27, 0, 0 } }, 0x0006f498, 1, KS_MPEG2Profile_Main, KS_MPEG2Level_Main, 0, (DWORD)SequenceHeader } }; the SequenceHeader is the sequence Header array that is supposed to be passed. Thanks. Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62242
  - 15
    - If a file system filter driver is installed using DIFxAPP, does it show up in Device Manager? Previously, with our manual method of installing a file system filter driver, I could go into Device Manager, right click on the top tree entry, select "Show Hidden Devices" and a "Non Plug and Play Devices" entry would magically appear. Our device driver would be there. From that I can stop/start and set the start type. I've just gotten a device install working with DIFxApp, and it doesn't seem to be available there. Is this the way it is supposed to be? How do I change the start type to manual (for instance), without going into regedit? Thanks, Bob Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62239
  - 16
    - Uninstalling a file system filter driver with DIFxApp When uninstalling a filter driver with DIFxApp, I notice that it doesn't remove the actual .sys file from c:\windows\system32\drivers. This is a violation of the Certified for Windows test. In looking through the DIFxApp.doc supplied by MS, there is a section that describes the uninstall steps, and by George, it doesn't mention deleting the installed files. From the DIFxApp.doc whitepaper: · Removes the driver package from the Driver Store. (Bob: I'm assuming this doesn't mean remove the actual driver file. This has to do with the .inf and .cat, right?) · Updates the association between the service, the driver, and applications. For more information, see "Associating Services, Driver Packages, and Applications" later in this paper. · Deletes the corresponding entry for the driver package in Add or Remove Programs. (Bob: actually no add/remove entry was created) Is it okay to leave these files there, or is there a way to get them deleted? Thanks! Bob Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62238
  - 17
    - DIFxApp available for amd64 CPU? The version 1.1 SDK I found contains only ia64 and x86 code. For AMD64, can I use the x86 DLL's? Thanks, Bob Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62237
  - 18
    - DIFxApp is failing - saying drivers are unsigned when they are! I've gone through hell to get this far: Using Installshield X, ran their "Device Driver Wizard" hand-fiddled the tables so they compile correctly got a valid code signing Certificate from Verisign created a catalog pointing to the .inf and .sys files SIGNED the damn catalog file when I run setup, I get the following: DIFXAPP: InstallDriverPackages DIFXAPP: 'CustomActionData' property 'DIFxApp Version' is 1.1. DIFXAPP: 'CustomActionData' property 'UI Level' is 5. DIFXAPP: 'CustomActionData' property 'componentId' is {33C87C1F-F8A4-4834-9F3D-A9026D067632}. DIFXAPP: 'CustomActionData' property 'componentPath' is C:\Program Files\FBN product\driver\. DIFXAPP: 'CustomActionData' property 'flags' is 0x3. DIFXAPP: 'CustomActionData' property 'installState' is 2. DIFXAPP: 'CustomActionData' property 'ProductName' is Product. DIFXAPP: 'CustomActionData' property 'ManufacturerName' is FBN Industries. DIFXAPP: Analyzing driver package "C:\Program Files\FBN product\driver\driver.inf". DIFXAPP: Driver package 'C:\Program Files\FBN product\driver\driver.inf' is unsigned. Error code 0x800B0100. DIFXAPP: ERROR 0x800B0100 encountered while adding driver package C:\Program Files\FBN product\driver\driver.inf to the driver store DIFXAPP: InstallDriverPackages failed with error 0x800B0100 Action ended 14:26:21: InstallFinalize. Return value 3. As far as I can tell, the thing is signed (using 'signcode.exe'). If I use chktrust: > chktrust -v driver.cat It displays the certificate. Any ideas???? Thanks for any guidance. Bob Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62235
  - 19
    - create a opentype or truetype "file" from FONTOBJ Hi I have to send the font related to a FONTOBJ to an other computer. So I have to get the whole "font file" ... but, since it doesn't have to be a file always (embedded fonts etc.), I don't want to use the functions that return the filenames to find the data. So I'd like to build the file using functions like FONTOBJ_pjOpenTypeTablePointer and FONTOBJ_cGetAllGlyphHandles and FONTOBJ_cGetGlyphs ... I think this should be possible (at least for truetype and opentype)... but my problem is, that I don't understand how to handle those tables. What tables are required? How is a opentype/truetype font structured? ... can someone explain me this? ... and could this work, what I'd like to do? thanks MR Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62232
  - 20
    - Use of RtlCheckRegistryKey in WDM driver? My WDM driver needs to know if a particular registry key exists The following code fails with a 3C status even when the reg path exists UNICODE_STRING uszTemp; OBJECT_ATTRIBUTES ObjAttrs; KEY_VALUE_PARTIAL_INFORMATION valueInfo; UNICODE_STRING uszName; RtlInitUnicodeString(&uszTemp,"\\Registry\\Machine\\SOFTWARE\\xxx"); InitializeObjectAttributes(&ObjAttrs, &uszTemp, OBJ_KERNEL_HANDLE|OBJ_CASE_INSENSITIVE, NULL, NULL); RtlFillMemory(&valueInfo, sizeof(KEY_VALUE_PARTIAL_INFORMATION), 0x0); RtlInitUnicodeString(&uszName, L"yyy"); status = ZwOpenKey(&KeyHandle, KEY_READ, &ObjAttrs); By contrast, RtlCheckRegistryKey(RTL_REGISTRY_ABSOLUTE,L"\\Registry\\Machine\\SOFTWARE\\xxx\\yyy") returns STATUS_SUCCESS However RtlCheckRegistryKey only exists in ntddk.h. and does not exists in wdm.h This strongly hints that RtlCheckRegistryKey should NOT be used in a wdm driver. What do other people do? Is there a wdm.h compatible alternative to RtlCheckRegistryKey or a way of making ZwOpenKey work? Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62221
  - 21
    - Please : Need help about Port monitor Hello, Sorry, because I have already ask this question but I really need help on this topic. I made my own port monitor, and all works fine except at the starting of the spooler : all my printers which are connected to the ports managed by my port monitor, stay offline in the printer folder. I'm obliged to click manually on the menu "Use printer online" to start printing. Why does the print spooler indicates this state ? Do I forget anything in my port monitor ? I see that the print spooler can call SetPort or GetPort to retrieve information from Ports. Is there a relationship between this function and the behaviour that I can see. Thanks in advance for your replies. Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62218
  - 22
    - AttachedToDeviceObject unloaded? Hi All. I'm making my first steps in the File System Drivers programming world, so this question might not be very intelligent or challenging. I've followed the SFilter sample from IFS Kit in order to build my driver. In the sample, I've noticed the use of IoAttachDeviceToDeviceStack (or IoAttachDeviceToDeviceStackSafe). This function, if I understand correctly, is supposed to return the actual device that is directly "below" mine in the device stack. This device can be different from the device I was initially trying to hook, if other devices were already layered on top of it. Let's say I initialize the AttachedToDeviceObject member of my device's extension with the value returned from IoAttachDeviceToDeviceStack, like I understood I should. I Later pass my AttachedToDeviceObject value to IoCreateFileSpecifyDeviceObjectHint . What I couldn't figure out, is what happens if the device pointed to by AttachedToDeviceObject, which is the one that was between me and my target device when I hooked, gets unloaded. Does my AttachedToDeviceObject value reference uninitialized memory, and is therefore likely to cause a blue screen? As I have failed to find a way to discover the next device in stack dynamically, how can I overcome this hazard? Someone on osronline explained to me that the filter driver that is under mine should take care of that if it's unloaded, but I couldn't understand how is it supposed to change the pointer in my extension (AttachedToDeviceObject)? any help would be greatly appreciated. thanks. Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62210
  - 23
    - BulkUSB driver unstable on Laptop w/XP Hello, I am still a relative noob in the world of device drivers. I have had some success in the past but recently I have developed a problem that I can't find my way through. When I started I followed the Oney recommendations and selected a sample driver to start from. In this case I started with the sample BulkUSB driver source from the DDK. I adjusted the necessary block/buffer sizes to meet my device requirements and added IOCTL ID macros until I was able to do everything I needed. I compiled it and installed on Win2k. [and the crowd went wild] More recently I have replaced my development machine (the win2k laptop) with a new a new XP laptop. I am now paying for the relative ease with which I acquired my working DD. When I plug my device in to this laptop I frequently but not always get the BSOD! Before I enabled legacy support in the laptop firmware I got the BSOD whenever the device was attached...even on reboot. I am more prone to distrust my driver's completeness than any sort of odd hardware incompatibilities but really I don't have a basis for that either. I am at a loss where to go from here. I am certain that before too long someone who has one of our devices will hit this situation. I want to solve it before that. I have rebuilt the driver in the XP build environment of the DDK. That initially appeared to help but then the BSOD started re-appearing. I can provide much more information but I don't know what is relevant and what is not. This is a simple bulkUSB device. It has 2 endpoints (1 out, 1 in). When I don't get the BSOD everything works pretty much the way I want it to. Hopefully someone here has a tip that might nudge me in the right direction. TIA, Kevin Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62205
  - 24
    - problem with virtual audio driver Hi everybody, I built the DDK samples related to virtual audio drivers (MSVAD). When I install it and use it, the virtual audio driver is supposed to write to wave files (and store them in C:\ by default) what we would normally hear (all the played sounds). But it only works the first time. The first played sound is well recorded (until the end of the buffer) but then, only empty ("corrupted" according to winamp...) wave files (44 bytes) are generated. Any idea to solve this problem ? Best regards, Giuseppe Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62203
  - 25
    - Enumerating drivers Hi, how can I programmatically (in any .net language) receive a list of all network drivers bound to a network adapter? (I need to check if some specific driver is bound to the adapter - and then possibly (de)activate this one). is this possible? Thanks Peter Tag: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 Tag: 62193

Those who cannot attend this year's WinHEC and Driver DevCon in
Seattle, WA (like myself, unfortunately):

Live Webcast of
Bill Gates Keynote from WinHEC 2005
April 25th, 2005
9:30-11:00 A.M. Pacific Time
(includes introduction by Marshall Brumer 9:30-10:00 A.M.)

-> http://www.microsoft.com/events/executives/billgates.mspx

(= 4:30pm GMT, allow for daylight saving time where applicable)

See also

http://www.microsoft.com/whdc/driverdevcon/
http://www.microsoft.com/whdc/winhec/

Stephan

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Re: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 by 440gtx

440gtx
Mon Apr 25 22:17:20 CDT 2005

> http://www.microsoft.com/events/executives/billgates.mspx

Thanks, but I get an error pop up when trying one of the feeds "Windows
Media Player cannot play the file because the specified protocol is not
supported". I am running XP SP2 & Media Player 10.

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Re: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 by Stephan

Stephan
Tue Apr 26 00:56:43 CDT 2005

No problems on my end, whatsoever. I watched the live show yesterday.

It is now available as archive (and that also works for me) at the same
address (http://www.microsoft.com/events/executives/billgates.mspx).

Stephan

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Re: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 by Arkady

Arkady
Tue Apr 26 02:49:06 CDT 2005

Thanks , Stephan !
Worked great for me too ( the same XPSP2 with MediaPlayer10 )
Arkady

"Stephan Wolf [MVP]" <stewo68@hotmail.com> wrote in message
news:1114495003.556374.199290@z14g2000cwz.googlegroups.com...
> No problems on my end, whatsoever. I watched the live show yesterday.
>
> It is now available as archive (and that also works for me) at the same
> address (http://www.microsoft.com/events/executives/billgates.mspx).
>
> Stephan
>

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RE: Bill Gates Keynote from WinHEC 2005 - April 25th, 2005 by pavel_a

pavel_a
Tue Apr 26 14:02:07 CDT 2005

Thanks Stephan,
I've missed it because it overlapped some interesting technical sessions :)

--PA

"Stephan Wolf [MVP]" wrote:
> Those who cannot attend this year's WinHEC and Driver DevCon in
> Seattle, WA (like myself, unfortunately):
>
> Live Webcast of
> Bill Gates Keynote from WinHEC 2005
> April 25th, 2005
> 9:30-11:00 A.M. Pacific Time
> (includes introduction by Marshall Brumer 9:30-10:00 A.M.)
>
> -> http://www.microsoft.com/events/executives/billgates.mspx
>
> (= 4:30pm GMT, allow for daylight saving time where applicable)
>
> See also
>
> http://www.microsoft.com/whdc/driverdevcon/
> http://www.microsoft.com/whdc/winhec/
>
> Stephan
>
>

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