assigning USB device drive letters

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- Previous
  - 1
    - Behavior of AVStream after returning STATUS_PENDING from Process routine Hi there, I am writing a filter-centric avstream mini-driver. However, I discover that the filter's process routine is kept entering even I have returned STATUS_PENDING. I have no other AttempProcess statement elsewhere in my code. What's wrong? I have tried to comment out the SetTimer statement of the AVStream avssamp sample... however, it still works by keep entering the Process routine... Thanks for your kindest help. Regards, Panda Tag: assigning USB device drive letters Tag: 45956
  - 2
    - _kernel_ is _WIN32 under windows equivalent to _KERNEL_ flag in linux? Tag: assigning USB device drive letters Tag: 45952
  - 3
    - Hel pn Wait_semaphore IFSMGR READ Hi all I am writing a VxD in 98. I am hooking to the IFSMGR functions. The requirement i Whenevr a File read happens The VxD will block the call and inform the ring 3 application. Then the ring3 app will decide whether to allow or deny the request. For communication between the ring0 and ring 3 i am using a shared event When i am blocking the Read request in the IFSMGR read I am using a Wait_Semaphore( Once the response comes We will signal the semaphore It is working for some files and system hangs for other Here is the pseudo code of what iam doin IFS_MGR REa Get The File Nam Copy the file name to a structur structure.SemaphoreHandle = Create_Semaphore(0) Put structure in Queu _VWin32_SignalEvent( shared event) Wait_Semaphore(structure.SemaphoreHandle) Allow/deny the reques End IFMGR REA whenever the ring 3 issues an ioctl to read the request Read from queu Whenevr the ring 3 is giving a respons Signal_Semaphore(structure.SemaphoreHandle This works fine with notepad But when i am accessign anything in c:\windows, All dll it is hanging Is the code is reentrant as in case of 2000 Thank Jone Tag: assigning USB device drive letters Tag: 45949
  - 4
    - How to getdrive letter of the USB flash drive Is it possible to know the Drive letter assigned the flash drive, after its plugged in, I know the vid/pid of the device, I just want to save some data to the flash drive, but need to know whats the drive letter, as it can be different on different machines. Waz Tag: assigning USB device drive letters Tag: 45948
  - 5
    - Does NTFS suitable for removable device such as SD (Security Digital) or MMC ? Hi Does NTFS suitable for removable device such as SD (Security Digital) or MMC ? Tag: assigning USB device drive letters Tag: 45947
  - 6
    - How to setting KSDATAFORMAT tructures for MPEG4?? Hi all For the datarange ,we can find KS_DATARANGE_MPEG1_VIDEO KS_DATARANGE_MPEG2_VIDEO for MPEG1 and MPEG2,how about MPEG4?? another members of KSDATAFORMAT what value should I set?? Thanks a lot Tag: assigning USB device drive letters Tag: 45945
  - 7
    - TDI_EVENT_DISCONNECT When ClientEventDisconnect() is called I know how to get the address object but how do I get the connection object? Tag: assigning USB device drive letters Tag: 45943
  - 8
    - How to let FAT and FAT32 available only, for Formatting SD in windows XP Hi I am writting a SD (Security Digital) driver for WinXP/Win2000, after SD driver was installed. I wish that when I format the SD, there are only FAT and FAT32 available for choosing. How to do that Is it possible to do that by adding something in driver By the way, my SD driver was written in SCSI miniport. Thank you anyone who can give me a help Tag: assigning USB device drive letters Tag: 45941
  - 9
    - conditional compilation hi i do have a scenario in which certain portions of the file are to be included for a driver and others for user mode programs. i want to carry on a conditional compilation. does windows 2003 ddk build generate some env variables or flags to say if its a driver thanks. Tag: assigning USB device drive letters Tag: 45939
  - 10
    - how to control the COM-port from driver hello i've opened COM-port with ZwCreateFile. now i in need to control the port. how it can be done thank you. Tag: assigning USB device drive letters Tag: 45932
  - 11
    - HID implementation on Windows XP/Longhorn We're putting together an ASIC that exposes HID as well as non-HID devices on the same chip, with one USB device port. That is, there's one device, several endpoints, several configurations. My question is.. Is it better to put these devices behind a hub, or to just expose the multiple endpoints without a hub? We're still in the hardware design phase, so we can go either way I had read somewhere that there are issues with using the stock Microsoft HID driver if there are other endpoints peered to it. Any and all comments are appreciated Thanks in advance! Tag: assigning USB device drive letters Tag: 45923
  - 12
    - USBCAMD2 Video Freeze issue. Hi all, I'm having a stange problem with a USBCAMD2 based driver for a custom USB camera we're working on. We have only 1 video stream whose format is RGB24. In ProcessRawVideoFrameEx(), if I do the following: frameBuffer = (BYTE*)FrameBuffer; frameBuffer[0] = frameBuffer[1] = frameBuffer[2] = 0; . . fill in the rest of the frame buffer with actual data . the video frame is not drawn. However, if frameBuffer[0], frameBuffer[1], or frameBuffer[2] is non-zero, the video frame is drawn (Note that only one needs to be non-zero, not all three). We noticed this because the video stream would "freeze" whenever the first pixel was completely black RGB(0,0,0). As soon as the pixel goes to anything but black, the video resumes. Has anyone else seen this? I find it quite bizarre & can't figure out why it's doing it. Thanks, Jerry Tag: assigning USB device drive letters Tag: 45920
  - 13
    - how to check a driver's version ? hi: I'm using Windows XP with VC 7.1. Is there a Win32 API to check a driver (*.sys) version? Thanks Polaris Tag: assigning USB device drive letters Tag: 45918
  - 14
    - memory mapped files I'm loading a large file into a section with ZwCreateSection. Then I'm going to map a view with ZwMapViewOfSection I only need a portion of this file to be visible in my View. But the portion starts say at offset X into the file. I only need to read Y bytes of the file from that point on. Are the SectionOffset and ViewSize arguments for ZwMapViewOfSection the right guys for this job If X is not an even multiple of the PAGE_SIZE, then where is the rounding down reflected so that I am aware of what the Base Address is actually pointing at. Is it pointing to the 0th byte of my view, i.e the Xth byte of my file or are other offsets involved Please fix this picture for me Virtual Memory p == page boundr ( ==start of my file after its mapped int ) == end of my fil X == start of where I'm intereste Y == length in bytes of what I'm intereseted i ] == end of where I'm intereste p-------....--------p--------...----------p-------------------p---------...-------p------- ... (------...-----------------X----...-Ybytes-.....-----]------...------ I don't want to end up wasting LOTS of space in the VM system and lots of time loading up the system with data I'm not interested in Thanks Tag: assigning USB device drive letters Tag: 45908
  - 15
    - User-mode midi-driver Hi everyone, I'm not sure if this is the right place to ask for, but I will just go ahead: I'm currently writing a virtual midi-driver which is implemented in a user-mode-driver mymidi.drv. I have taken the sample from the nt 4.0 ddk and adapted it to my needs. I got two problems: 1.) If I install on a system where no midi-driver has been installed previously, my driver will not show up in the audio & midi settings in the control-panel. I think that I need to install some MS component which will not exist until the first midi-driver is installed... Any hints, on what I need to include in my inf-file? 2.) If I get this thing installed right (on a system which already got a midi-port active), the driver is installed. Unfortunately there, the audio & midi settings control panel applet won't start any more. With OutputDebugString I found out, that my driver is loaded and the DriverProc is called with "DRV_LOAD" - but that's it... Does anyone have ideas why driver-loading seems to fail (even so bad that the control panel applets aborts)? Best regards, Tobias Tag: assigning USB device drive letters Tag: 45905
  - 16
    - printer properties Hi Does someone know if a printer driver has to have a custom property page or not? Is it possible to specify, that my printer driver has no property pages during DrvDevicePropertySheets ?? MR Tag: assigning USB device drive letters Tag: 45900
  - 17
    - Automatic testcap driver installation Hello, Any clues how to install wdm Testcap driver automatically? I've tried to run with "rundll32.exe setupapi,InstallHinfSection Testcap.Device 132 .\testcap.inf". The installation confirmation dialog (warning about the uncertified driver to be installed) appears ok and no errors is notified. But after the installation the wdm capture driver is still not installed. regards, -- Timo Tag: assigning USB device drive letters Tag: 45894
  - 18
    - Auto-Reconnecting USB-Stick after DEVCON DISABLE.. - How To ? Hi everyone, have to use a USB memory stick on a w2k workstation - without a mouse! --- 1st question: Is there a way to simulate the click on that tray icon? E.g. with a startmenu entry, accessible with some keystrokes? --- 2nd question: I fooled around with DEVCON and now I'm able to "disconnect" an "enable" the drive manually with two BAT files. But after that disabling, unplugging and replugging, the drive will not be enabled automatically as it does after removing it with a click on that tray icon. Instead, I have to enable it also maually... What is different between the tray icon and DEVCON? The documentation for both is too poor, imho. Best regards, Schrotti -- Using Opera's revolutionary e-mail client: http://www.opera.com/m2/ Tag: assigning USB device drive letters Tag: 45889
  - 19
    - USB printer status, PJLMON and UI application. Hi Friends, Recently I have been assaigned the task to write a program to check the status of a 3rd party USB printer before issuing a print job. The application should find all the statuses like printer ofline, out of paper, paper jam etc.,. The vendor is not installing Language Monitor dll during installation. When I did some research I found that we have to use PJL language and a Language monitor. I also found that the printer we are targeting supports PJL and Microsoft provides a sample PJLMON Language monitor in DDK. Following is the mechanism I want to use to achieve this goal: Modify the PJLMON sample and install on the machine by modifying the printer vendor supplied .INF file. In PJLMON sample add logic to notify a UI application about the status changes( really I don't know whether using Named pipes will work here, But I will try Named pipes.) The UI application will listen for the status changes and update UI accordingly. Is this logic going to work? Am I going in a right direction? someone please help me. Please direct me to some useful resources , books or samples. I appreciate you all for taking some time to read this message . Thanks, Jagadish. Tag: assigning USB device drive letters Tag: 45887
  - 20
    - how to redirect a DeviceControl Irp hello i need a device implementing the Modbus serial port. to obtain resources of COM-ports i've installed a higher level FiDO for every Serial PDO. at StartDevice routine the FiDO creates a child device (not in Serial stack) which inherits resources. child device called ZwCreateFile with name of linked COM-port when it opened - it solve ACPI problem how to supply device control, made by user progamm? is it possible to redirect DeviceControl Irp's, incoming into child FDO, to Serial FDO or to my FiDO thank you Tag: assigning USB device drive letters Tag: 45872
  - 21
    - BMP format & PCL format Hi, All, I create a 8*8 bytes, 256 RGB BMP file (use Paint of Windows), and use HP printer printed it to files (PCL 5e). I studied the PCL file and find the data field. I can not understand what dose it mean. Need someone's help. Thanks! The BMP file I filled in red, and the BMP file in Hex code, Dard red is 2. I can read 32 bytes (22) in the BMP file. And the PCL 5e file in Hex, I don't understand the Hex indicated red color. (Esc * b # W [raster data], referenced by PCL 5 Printer LanguageTechnical Reference Manual) 1B 2A 62 34 57 FA FF 00 E0 (1B 2A 62 34 57 means Esc*b4W) 1B 2A 62 34 57 FA 7F 00 60 1B 2A 62 34 57 FA 3F 00 20 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 39 57 07 F3 F7 F3 F7 F3 F7 F3 E0 1B 2A 62 34 57 FA F3 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA 7F 00 60 1B 2A 62 34 57 FA 3F 00 20 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 39 57 07 F7 F3 F7 F3 F7 F3 F7 E0 1B 2A 62 34 57 FA F3 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA 7F 00 60 1B 2A 62 34 57 FA 3F 00 20 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 39 57 07 F3 F7 F3 F7 F3 F7 F3 E0 1B 2A 62 34 57 FA F3 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA 7F 00 60 1B 2A 62 34 57 FA 3F 00 20 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 39 57 07 F7 F3 F7 F3 F7 F3 F7 E0 1B 2A 62 34 57 FA F3 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA 7F 00 60 1B 2A 62 34 57 FA 3F 00 20 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 39 57 07 F3 F7 F3 F7 F3 F7 F3 E0 1B 2A 62 34 57 FA F3 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA 7F 00 60 1B 2A 62 34 57 FA 3F 00 20 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 39 57 07 F7 F3 F7 F3 F7 F3 F7 E0 1B 2A 62 34 57 FA F3 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA 7F 00 60 1B 2A 62 34 57 FA 3F 00 20 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 39 57 07 F3 F7 F3 F7 F3 F7 F3 E0 1B 2A 62 34 57 FA F3 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA FF 00 E0 1B 2A 62 34 57 FA 7F 00 60 1B 2A 62 34 57 FA 3F 00 20 1B 2A 72 43 1B 26 61 30 50 There is something in order in the above Hex, would you tell me the detail? -- Thanks & Regards Daniel Tag: assigning USB device drive letters Tag: 45871
  - 22
    - USB Driver Installation Problem? I am using USB Device 1. First time installalling the driver and the USB device works fine 2. But when I again reboot the system, system can't recognize the USB device But sometimes when I reboot, system can recognize the USB device 3. But When I feed the external power source to the USB device and reboot the system, system can recognise the USB device always 4. What is the problem, when not using external power supply Is the problem in PC or USB Device Driver 5. The above problem is only in IBM Think PAD X24 6. The OS is Windows 2000 Please send me suggestions Thanks a lot in advanc By Tag: assigning USB device drive letters Tag: 45869
  - 23
    - USB Device Installation error? I am using USB Device 1. First time installalling the driver and the USB device works fine 2. But when I again reboot the system, system can't recognize the USB device But sometimes when I reboot, system can recognize the USB device 3. But When I feed the external power source to the USB device and reboot the system, system can recognise the USB device always 4. What is the problem, when not using external power supply Is the problem in PC or USB Device Driver 5. The above problem is only in IBM Think PAD X24 6. The OS is Windows 2000 Please send me suggestions Thanks a lot in advanc By Tag: assigning USB device drive letters Tag: 45859
  - 24
    - USB Device I am using USB Device 1. First time installalling the driver and the USB device works fine 2. But when I again reboot the system, system can't recognize the USB device But sometimes when I reboot, system can recognize the USB device 3. But When I feed the external power source to the USB device and reboot the system, system can recognise the USB device always 4. What is the problem, when not using external power supply Is the problem in PC or USB Device Driver 5. The above problem is only in IBM Think PAD X24 6. The OS is Windows 2000 Please send me suggestions Thanks a lo Bye Tag: assigning USB device drive letters Tag: 45856
  - 25
    - Does bulkusb.sys support overlapped I/O? Hi all, I'm currently adapting the bulkusb.sys driver from the latest DDK (Win2K3 DDK). Does anyone know for sure whether it supports overlapped I/O or not? All they seem to say is that it's multi-threaded safe. Thanks. Tag: assigning USB device drive letters Tag: 45850
- Next
  - 1
    - floating point math Hello I have to use floating point math(like floor, pow in std C lib math.h) in my device driver. But I heard Win NT kernel mode driver does not support floating point math Does anyone know how to implement floating point calculations Thank you very much for the help Tag: assigning USB device drive letters Tag: 45849
  - 2
    - Disappearing Symbolic link and device Objects I have driver pair X and Y. Both are installed as a Demand Start sevices by a console app. Upon load, Driver X creates a link \\??\\Driver_X for user mode access and loads driver Y (using ZwLoadDriver). The symbolic link creted by drive X ( \\??\\Driver_X ) mysteriously disappears if I unload driver Y using the console app ( it calls service control manager StopService). The user mode apps fails to open X, obviously becuase it couldnt see the link. I verified the disappearence of the link with the sysinternals winobj. But I see the existance of the link with Osr's objdir!!! Is there any explnation why this happens? I am sure that neither the Device object nor symbolic link created by Driver X are explicitly deleted by Driver X( X never calls IoDeleteDevice or IoDeleteSymbolicLink in this case). This doesnt happen if I load X ( which in trun loads Y). Reboot the machine then try unload X using the same console app. I am running Windows 2000. This happens in only one machine, another 20 or so machines ok. -Sen Thanks, Sen Tag: assigning USB device drive letters Tag: 45844
  - 3
    - video mirror driver Hi, I need to modify the mirror driver to get a simple information: whatever is the application that modify the desktop i need to know what is the region that Windows draw and/or update (RECT). I'm sure that this information is in the struct SURFOBJ of DrvBitBlt and DrvCopyBits so hooking this call I can grab such information. The question is: how can I send this information to UserMode Application? Can I use a IOCTL or a ReadFile ? Thanks, Pierluigi M. Tag: assigning USB device drive letters Tag: 45838
  - 4
    - slim difference ? In IoCreateFile what is the difference between disposition values of FILE_SUPERSEDE & FILE_OVERWRITE_IF Tag: assigning USB device drive letters Tag: 45827
  - 5
    - sources/Build.exe alternate source file location question Is it possible to specify a source file that is in a different folder than the current one or the parent folder? It seems that when I specifiy "SOURCES=foo.c", Build.exe looks in the directory above and then the current directory. I would like to be able to specify "SOURCES=..\AltDirectory\foo.c" , but Build.exe whines and complains when I do. Any ideas? Thanks, John Tag: assigning USB device drive letters Tag: 45806
  - 6
    - AVStream: Using InterlockedAnd(), InterlockedOr(), InterlockedXOR() LONG InterlockedAnd ( IN OUT LONG volatile *Destination, IN LONG Value ); I'm using ... LONG volatile dest; LONG value, retval; retval = InterlockedAnd (&dest, value); ... Compiler: error C3861: 'InterlockedAnd': identifier not found, even with argument-dependent lookup error C3861: 'identifier': identifier not found, even with argument-dependent lookup The compiler was not able to resolve a reference to an identifier, even using argument-dependent lookup. Any ideas? Tag: assigning USB device drive letters Tag: 45800
  - 7
    - KeQueryPerformanceCounter problems In this code LARGE_INTEGER liTickCount; LARGE_INTEGER liFrequency ; liTickCount = KeQueryPerformanceCounter( &liFrequency ); I get a crash as soon as I try to access liFrequence Any ideas ? TIA Lars Tag: assigning USB device drive letters Tag: 45799
  - 8
    - CMI8738/PCI Device Driver Hi, I don't know my audio driver for my computer here it is a pentium 3 1000 mhz but when I open the box I find this information on something inside. E3DX HSP56 CMI8738/PCI HRTF Audio com Does anyone have an idea what his means and how I can figure out what my driver is and where I can get it from. Thanks in Advance, Logan Tag: assigning USB device drive letters Tag: 45792
  - 9
    - DrvDevicePropertySheets Hello Does someone have a SIMPLE example of a printer drivers DrvDevicePropertySheets function? I tryed to figure out what it has to do with the plotui sample of the DDK... but this sample is far away from being simple. There are thousands of modules linked together and even more functions called (it's impossible to follow the way the program takes)... but what I want is only to show a simple property sheet... with nothing on it... or just one option... but not all the stuff they have in this plotui sample. I hope someone can help me. thanks MR Tag: assigning USB device drive letters Tag: 45786
  - 10
    - GetTickCount in Kernel mode Hi What is the equivalent for GetTickCount or QueryPerformanceTimer in a kernel mode driver ? TIA Lars Tag: assigning USB device drive letters Tag: 45780
  - 11
    - ReadFile problem I'm writing a printer driver and I need to ask the printer for its status. I sent a command to the printer through WriteFile and it worked fine (using serial communication). When I try to read from the printer with ReadFile it crashes. I have a printf after the ReadFile command and it never displays it. Any suggestions Harry Tag: assigning USB device drive letters Tag: 45776
  - 12
    - Pending IRP A driver can't have more then 1 IRP pending from a specific file handle? For example, if I have a read IRP pending, I won't receive a IOCTL IRP (on the same handle). The requests are sent from a win32 application. Tag: assigning USB device drive letters Tag: 45775
  - 13
    - how to convert a dotted-decimal IP address into host internal IP address Hi,All, It is very convenient to use a dotted-decimal ip address,however,TDISendDataGram requires a ULong-typed IP address. Hence a convension is necessary.Is there any function in windows kernel mode which can assume this duty? Tag: assigning USB device drive letters Tag: 45770
  - 14
    - Urgent : Reloading settings for NDIS driver Hello Now, I'm getting desperate. I need to reload the settings for the NDIS driver on Windows 2000 / XP. I use it for using the USB as a NIC and I have to setup the IP address from a service. Unfortunately, these settings are only read when starting the NDIS driver and I need a way to reload these settings/loading the NDIS driver on Window 2000 / XP other than pulling the cable out and reinserting it. I got it working on Windows CE. Please help me. Henrik Tag: assigning USB device drive letters Tag: 45769
  - 15
    - Interdriver communication page fault hi, i am a novice at drivers and need some help .. some days back i posted a query regarding mechanisms for interdriver communication among drivers not on the same stack. One of the mechanisms told was to build an IRP using IoBuildDeviceIoControlRequest() and send using the IoCallDriver() method. I allocated the buffers and built an IRP using the IRP_MJ_INTERNAL_DEVICE_CONTROL ioctl and sent it via IoCallDriver. I did it in the Passthru IM driver's MPSend() function. The idea is to route the incomming and outgoing packets' data to the TargetDriver for processing. I put the breakpoint on the SourceDriver's function in SoftICe. Now this scheme works fine once or twice when the function is called but after that there is a PAGE FAULT and everyting crashes. I thought i could get some advice on this forum regarding this. Can anybody help me with any suggestions regarding what i may be doing wrong ??? when i see the stack in the SOftIce the top most function in the stack is IoBuildDeviceIoControlRequest() .... ?? i am posting the code for the source driver(passthru)'s function and the corresponding handler in the target driver below int SourceDriver::ProcessPacket( ... KeInitializeEvent(&TargetWriteEvent, NotificationEvent, FALSE) SysInBuffer = ExAllocatePool(NonPagedPool, inparamsize) SysOutBuffer = ExAllocatePool(NonPagedPool, outparamsize) .... TargetWriteIrp = IoBuildDeviceIoControlRequest(IOCTL_Target_Process_DUMMY Target_DeviceObject SysInBuffer inparamsize SysOutBuffer outparamsize TRUE &TargetWriteEvent My_Status_Bloc ) ntStatus = IoCallDriver(Target_DeviceObject, TargetWriteIrp) if(ntStatus == STATUS_PENDING ntStatus = KeWaitForSingleObjec &TargetWriteEvent, Executive, KernelMode, FALSE, NUL ) if (ntStatus == STATUS_TIMEOUT) DbgPrint("\nCanceling IRP to Target\n") IoCancelIrp(TargetWriteIrp) KeWaitForSingleObject(&TargetWriteEvent, Executive, KernelMode, FALSE, NULL) els ntStatus = TargetWriteIrp->IoStatus.Status; ..... //copy data from output buffer passed to ir ExFreePool(SysInBuffer) ExFreePool(SysOutBuffer) return 0 ///////////////////////////////////////////////////////////////////////////////////// NTSTATUS Target_Process_InternalIOCTL(IN PDEVICE_OBJECT fdo, IN PIRP Irp ..... switch(Control_Code .. case IOCTL_Target_Process_DUMMY KdPrin ( "%s%s", "Target_Process_InternalIOCTL: ", "case IOCTL_Target_Process_DUMMY\n )) DataLen = ((PULONG)Irp->AssociatedIrp.SystemBuffer)[1] ((PULONG)Irp->AssociatedIrp.SystemBuffer)[0] = 0; //Declare the result as success for(i=0; i< DataLen; i++ ((PULONG)Irp->AssociatedIrp.SystemBuffer)[5+i] = ((PULONG)Irp->AssociatedIrp.SystemBuffer)[7+i] ntStatus = STATUS_SUCCESS info = Irp->IoStatus.Information break ... return CompleteRequest(Irp, ntStatus, info) i thank you all in advace tojo Tag: assigning USB device drive letters Tag: 45766
  - 16
    - Unidriver Plug-in Hi I have added a tab in document properties by Unidriver plug-in and in that tab I have got 2 list boxes for font substitution I have hidden fontsustitution controls from standard Advance dialog by setting flag OPTIF_HIDE To populate list boxes on my tab I have done it from OptItems. My listboxes are getting populated correctly and are retriving settengs correctly depending upon the (pOptItems + index)->Se But my problems is when I set it does not save the value I change the pOptitems + index->Sel , Modify the flags with OPTIF_CHANGED and then call DrvUpdateUISetting() for that optItem This method works fine with all other features like copies, orienation, Tray etc but not only for fontsbustitution tabe . Is there any thing special with font sustitution table Thanks Naveen Tag: assigning USB device drive letters Tag: 45764
  - 17
    - how to build communication between TSR and driver? I want to transfer some data which residents in tsr to driver. The driver is set to "system bus extender" group, and the data residents in conventional memory(it is usually at 9C80:0-9c80:400), and it works well in 2k, but failed in nt4.0. Does anyone know the reason on it Best regards Polo Tag: assigning USB device drive letters Tag: 45756
  - 18
    - How to hook Mute, Volume Up, and Volume Down key under win98? Hi,All, I'm try to hook the MultiMedia key, under win2k or up, I use keyboard hook WH_KEYBOARD_LL should be Okay. But under win98 and winme, the WH_KEYBOARD_LL doesn't support, I can only use WH_KEYBOARD, it does not work. I could not hook any MultiMedia key (Such as Mute, Volume Up, and Volume Down), and use Spy++, nothing could be catched. Does anyone who knows about this. Needs help. -- Thanks & Regards Daniel -- __?__ / \ / ^ ^ \ ( (o) (o) ) \ / *=oOOO======(_)=====OOOo====*=====================================* | | SHANGHAI CELLINK CO, LTD. | | Daniel Xu | danielxu22@cellink.com.cn | *=============Oooo.=========*=====================================* .oooO ( ) ( ) ) / \ ( (_/ \_) Tag: assigning USB device drive letters Tag: 45755
  - 19
    - preventing inside IFSFN_READ...Win98 ...Vxd Hi, I am allowing inside IFSFN_OPEN. but I want to deny file operation inside IFSFN_READ.Is it possible to set error condition in Iorequ structure and return file deny from inside IFSFN_READ? Plz help me out I am writing file system filter driver. regds vinay Tag: assigning USB device drive letters Tag: 45746
  - 20
    - Buffered or Direct I am writing a driver that will need to receive a pointer to a physical address to be used for DMA from another device (not the one controlled by my driver). I have control over the interface between the two devices. I wish to pass a small structure to the "other" device in the output buffer of an IOCTL call. One fo the fields in this structure will be used to pass a physical address. My first assumption is that physical (or "logical") addresses are safe to pass from one device to another. Should I pass the aforementioned structure to the second device using direct or bufferd IO? Performance is my main objective, since the actual data transfer between the devices will be relatively small will the buffered technique actually be more efficient Brian Tag: assigning USB device drive letters Tag: 45743
  - 21
    - Miniport question Ok, I have question ... when do miniport drivers get unloaded by the system and what is the mechanism for doing that? Also, how does a video miniport differ from the more general miniports? What I'm seeing is ... that the video miniport never exits. When I remove the device the miniport is still active, when I insert the device another instance of the miniport (i think) is getting loaded. How do I cause the video miniport to exit? Brian Tag: assigning USB device drive letters Tag: 45742
  - 22
    - AVStream: DMA & Process() QUEUEing Hi All, Testing out a capture driver and get a Process() call, start DMA operation, then return from Process(). I get called with subsequent Process() calls prior to my DMA completion. Is it common to have a QUEUEing mechanism in the AVStream driver? Tag: assigning USB device drive letters Tag: 45738
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    - W2K equivalent functionality question ioenumeratedeviceobjectlist only appears in XP and beyond. What is the best way to implement this functionality in W2K ? Tag: assigning USB device drive letters Tag: 45734
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    - filter above serial waits for special char hello everyone, have installed an upper filter above serial and want to let it listen fo= r = a special character. this char will be send from a device to the com-port, where my filter is= = attached on. in detail: from an usermode app. a deviceIoControl - request is send to my filter.= the dispatch-routine for this ioctl-request sends a char to the com-port= = via self-made irp (IoBuildAsynchronousFsdRequest, IoSetCompletionRoutine= , = IoCallDriver)... that works fine so far. but, after that i need to listen for an answer from the connected device= , = which is a special character. after this char is identified, a next writ= e = with some buffer content has to start immediately. my first idea was to set up a workerthread right after the write, which = = sends a synchronous read request down to serial and waits. then, the = thread validates the content of the readbuffer and initiates the next = write-op. my question is, is this a realistic method? (this is my first experience= = in driver programming) and, can such a construction react fast enough, that the delay btw. = incoming answer and next write is physicaly below 6 ms ? thanks for your answers Tag: assigning USB device drive letters Tag: 45732
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    - Writing an USB Driver I am looking for a template of a generic USB device driver Have you any Wher can I find it Best regards Tag: assigning USB device drive letters Tag: 45727

I have a problem with a bunch of newer computers running 2000/XP where USB removable devices take mapped drive letter F: (used for a legacy application). Is there a way to in XP to start assigning letters for removable devices at a certain letter (say U:). The removable devices can change so permanently changing the device letter in disk management only works until they plug in a new device (that has not yet been permanently assigned a letter)

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