How to Set default audio device?

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  - 1
    - question about using VC6 with DDK Hello, i just bought Walter Oney's book on WDM drivers. so far it is really good, but i am just at page 100. at this moment i have 2 question: - in the introduction Walter says that he uses VC6 for programming and building device drivers, but i havent found am explanation so far that tells me how to set this up. is it enough to just change the compiler? and what am i supposed to enter for build target?is it enough to use the VC6 plugin or do i need to do more? - is it possible to use VC .NET 2003 instead of VC6? i still use both on my system, but i would rather move to VC .NET where possible. i am sorry if i ask questions that are answered in the book, but i have skimmed through it to see if they were, and did not find anything. i have not read the book completely, but wanted to compile an empty example to get a feel for it. rather than taking a finished example from the CD, i would build an empty driver myself so that when it is finished, i would really know what was in there. kind regards, Bruno. Tag: How to Set default audio device? Tag: 44380
  - 2
    - Bluetooth HCRP credit flow Hi Folks, I am developing an HCRP firmware (Printer side HCRP profile) and testing it against the XP Bluetooth HCRP driver. I am successfully able to - have the XP host detect my device as a "HCRP Printer", - the L2CAP Control and Data channels getting created - a new printer also gets added to my "Printers and Fax" collection on the HCRP Host. Now When I try and print a document using this HCRP printer following happens: a. I get a CR_DataChannelCreditRequest on the L2CAP COntrol Channel (Printer side) to which I reply with a large number of credits (0x00 00 00 00 00 FF FF FF). b. I start recieving bytes on the L2CAP Data channel. c. After recieving 64KBytes, the Host application doesnt send any more packets. Neither any bytes on Data Channel, nor any more CR_DataChannelCreditRequest. However I recv. all the data for if the print data is less than 64K, my question is this 64K any magic number ? IMO I should be getting periodic requests for credits on the Printer side after the HCRP Host has exhausted all the credits, but no such thing happens. How has the HCRP driver in XP been implemented to handle this situation ? I have also tried sending some credtis (voluntarily) from the printer side to the Host using the CR_DataChannelCreditGrant after the 64K bytes of credit have been exhausted, but to no avail. help in any direction appreciated. thanks people for all your patience. Deepesh Tag: How to Set default audio device? Tag: 44376
  - 3
    - Bypass print processor Hi I have a customized print processor associated to a printer. That print processor copies the Spool files of jobs printed by users. In another application, users will take actual print outs with those spool files using the same printer. When they are actually printing, I should bypass printprocessor (Otherwise, it again copies the spool files). How to write RAW data directly to Port monitor/Printer, bypassing the print processor In my application I tried like this StartDocPrinter() StartpagePrinter() Read the spool file() WritePrinter(); // Tried printer name, Port name. Both are spooling the data.1 loop until end of file EndPagePrinter() EndDocPrinter() In the above approach, printprocessor is getting invoked. Also I tried different spooler properties like Print directly to printer. That too didn't work Is there another approach all together(My client does not want 2nd printer associated to another print processor) Thanks & Regards Kira Tag: How to Set default audio device? Tag: 44374
  - 4
    - For readers of marginal notes I'm being a bit cryptic here -- deliberately. But, readers of marginal notes should be advised that the prize (such as it is) is ready to be won. -- Walter Oney Attribution Withheld Just This Once Tag: How to Set default audio device? Tag: 44363
  - 5
    - I am missing ExInterlockedRemoveEntryList It would seem to me that it would be necessary to have a routine lik ExInterlockedRemoveEntryList(plist_entry head, pList_Entry item, pkspin_lock lock in the ddk. There is a RemoveEntryList(pList_Entry) but that is clearly not a safe routine to use. Is it there under a different name? Don't you ever want to take something out of the middle of a list Tag: How to Set default audio device? Tag: 44357
  - 6
    - Refresh DVD driver Hello there I am working on creating DVD in the computer Now, I have one question I have no idea to refresh DVD buner after completing to burn DVD For example, when we use a floppy disc if the disk needs refresh as some files are deleted or created Window automatically refresh the disc and recognize what the new sets up. However, after DVD disc was wrote by some data, without exacting window can't recognize something changed I try to do many ways but in vain until now. I want to know refresh DVD disc infomation without opening and closing of driver thanks for any help Tag: How to Set default audio device? Tag: 44345
  - 7
    - Re: [Q] dwIoControlCode of DeviceIoControl : IOCTL_NDIS_QUERY_GLOBAL_STATS Thank you for your reply, Thomas. Hello, everyone. I¡¯m looking for a way to set 802.11 OIDs at Win2K. Then, is there any alternative way to set 802.11 OIDs? Currently, what I konw is 1) Using the "ndisuio" driver. However, at my knowledge, this ndisuio interface applicable WinXp only if not install the ndisuio driver separately. 2) Using WMI. At my knowledge, Win2K does not support 802.11 OIDs. Thank you. //Daum "Thomas F. Divine [DDK MVP]" <tdivine@NOpcausaSPAM.com> wrote in message news:OPHdqSMLEHA.1144@TK2MSFTNGP12.phx.gbl... > Ther is NOT an equivalent of IOCTL_NDIS_QUERY_GLOBAL_STATS that allows you > to SET a value. > > The is an absolute dead end for setting information. > > Sorry. > > Thomas F. Divine > http://www.rawether.net > > "Daum" <daum999@yahoo.com> wrote in message > news:ubvZrzKLEHA.3808@TK2MSFTNGP12.phx.gbl... > > Dear all, > > > > I have a stupid question. > > > > I know the dwIoControlCode of DeviceIoControl is > > IOCTL_NDIS_QUERY_GLOBAL_STATS for getting a OID value. > > > > However, I do not know the dwIoControlCode for setting a OID. > > > > Please let me know what the dwIoControlCode for setting NDIS OID is. > > > > Thank you. > > > > //Daum > > > > > > Tag: How to Set default audio device? Tag: 44336
  - 8
    - SetupCopyOEMInf stuck on oem0.inf Hey all, I'm using SetupCopyOEMInf to pre-install 2 different INFs. Both calls to SetupCopyOEMInf copy to oem0.inf. So basically the second copy overwrites the first. This did not used to happen and it does not happen on any other machines I've tested it on. This just started happening one day and it hasn't cured itself. Does anyone have any suggestions or ideas on what might be going on? Thanks, Chris Tag: How to Set default audio device? Tag: 44323
  - 9
    - port monitor XcvDataPort(pszDataName="MonitorUI") Hi all The MSDN docu says that: If XcvDataPort of a port monitor is call with the data name L"MonitorUI", it should return the name of the user interface DLL (which should reside in %System32%). I use a GPD printer description with the microsoft UNIDRV.DLL and UNIDRVUI.DLL UNIDRVUI.DLL is listed in the dependent files of my printer. My monitor answers L"MonitorUI" with L"C:\\WinNT\\System32\\UNIDRVUI.DLL". When I try to configure a port in the "ports" section of a printer's properties dialog, I get a message box telling me that this action could not be finished. Any hints welcome. Joerg M-T Tag: How to Set default audio device? Tag: 44317
  - 10
    - adapter questions Hi, Is it possible through NDIS or any other way to know if an adapter in my computer is a bluetooth adapter? another question. how do I know if a adapter is used in a bridge with some other adapter in windows xp? thanks Tag: How to Set default audio device? Tag: 44313
  - 11
    - Virtual Drive development Hello to everyone. I want to develop a virtual drive that will behave similarily with a normal disk, but to be mounted from a file in the original file system. The format of the file will be also developed by me. Can someone give me some directions? What to study, what is the architechture of such virtual drive? Do I need a new device driver developed? Do I need a File System Filter Driver? etc. I mention that I have DDK and IFS ready available as well as MSDN Library documentation. Thanks in advance for any help! Alex Tag: How to Set default audio device? Tag: 44305
  - 12
    - my driver can work on win 2000 but not win XP I have developed a driver for a device attached to serial port,which is compiled by 2000 DDK,it really works well on win2000.when it comes to win XP,it is not the case.win XP can not restart after shut down.what is the probable reason? My device does not need serial port to supply power,I have a transformer which does that. Is there any difference between my device and normal device that needs serial port's power? Tag: How to Set default audio device? Tag: 44304
  - 13
    - how to use AllocateCommonBuffer in bus master DMA?? Hi All Can anyone tell me how to use AllocateCommonBuffer in bus master DMA?? after I use AllocateCommonBuffer to get a logical address and virtual address what is the next setp I need to do ?? Just write logical address to my device,and wait for transfer complete interrupt,copy virtual address to my APP is ok?? It is no need to use AllocateAdapterChannel,KeFlushIoBuffers,MapTransfer FlushAdapterBuffers,FreeMapRegisters?? Thanks a lot,any sample code is welcome^^""" Tag: How to Set default audio device? Tag: 44300
  - 14
    - Why can't support T=1 protocol? My smartcard reader driver can support T=0 protocol, so i can use SmartcardT0Request and SmartcardT0Reply to get data and put data. But It can't support T=1 protocol.After calling SmartcardT1Request, i can't get the right data in "SmartcardRequest.Buffer".which wrong with it. Owen Tag: How to Set default audio device? Tag: 44299
  - 15
    - AVStream : Error on play a filter graph created by GraphEdit Dear All I implemented a MPEG2 HW decoder filter and could connect it to "MPEG-2 Demultiplexer" and "MPEG-2 Video Decoder" now. However, I met one problem when I tried to start/play this filter graph by GraphEdit. The error message is "This graph can't play. The device is not connected. (Return code: 0x8007048f)". Could anyone tell me what's happened Thanks Edward Tag: How to Set default audio device? Tag: 44296
  - 16
    - Devices with same interface class. I have installed two (virtual)devices with the same interface. The test application runs ok, but which device handle the request? Tag: How to Set default audio device? Tag: 44292
  - 17
    - PPC2003 802.11 Driver connection problem I have a driver for an 802.11 device that works on PocketPC2003 and I am trying to make it support windows 802.11 OIDs. Scanning works fine and Wireless properties panel displays all APs, and when I select one, OID_802_11_SSID comes to the driver correctly. I return NDIS_STATUS_PENDING, get the MAC to associate succesfully and in the assoc confirm indication I do NDisMSetInformationComplete, followed by NdisMIndicateStatus with NDIS_STATUS_MEDIA_CONNECT. OID_GEN_MEDIA_CONNECT_STATUS also shows connected state. But wireless properties does not show that I am connected to the AP. DHCP also does not happen. Why is this happening? Ndis goes on trying to associate with the other APs in the list, with the same result in each case. What else do I need to do to inform NDIS that the card is associated? I tried doing the connect indicate as soon as I get the set SSID request, to eliminate any timing problems, but there is no difference. My driver ndis version is 4.0 - when I tried building as 5.1 the driver did not load. Tag: How to Set default audio device? Tag: 44290
  - 18
    - Serial smartcard reader in win95/98 caused process msgsrv stop Hello everyone: I am working on improving our serial smartcard reader driver performance in win95/98. The reader works well with all the PC/SC standard cards now. But when connect the reader to PC,it caused process msgsrv stop. After disconnect the reader, the process msgsrv works ok. I have tried do the test with SCM111 reader, it hasn't such problem. What's possible wrong with my driver then? Thanks for your attention and help! Tag: How to Set default audio device? Tag: 44283
  - 19
    - [Q] dwIoControlCode of DeviceIoControl : IOCTL_NDIS_QUERY_GLOBAL_STATS vs. ? Dear all, I have a stupid question. I know the dwIoControlCode of DeviceIoControl is IOCTL_NDIS_QUERY_GLOBAL_STATS for getting a OID value. However, I do not know the dwIoControlCode for setting a OID. Please let me know what the dwIoControlCode for setting NDIS OID is. Thank you. //Daum Tag: How to Set default audio device? Tag: 44275
  - 20
    - Removable Cardreaders on my PC are not accessible When I open explorer I can't find any of the cardreaders (Smart Card; Smart Media; CF). I find only my CD-rom and DVD-player (+C: D: and E: drives) When I purchased the PC this what not the case How can I make them reappear ? Tag: How to Set default audio device? Tag: 44273
  - 21
    - Inside IoCompletion routine Hi I'm wondering if there are any restrictions of what functions can be called from IoCompletion routine When I'm trying to open text file from IoCompletion routine I've got "Blue screen" IoCompeletion routine works fine without this I'm using RtlInitUnicodeString(&usname, LOG_FILE) InitializeObjectAttributes(&oa, &usname, OBJ_CASE_INSENSITIVE, NULL, NULL) status = ZwCreateFile(&FileHandle, FILE_APPEND_DATA|GENERIC_READ|SYNCHRONIZE, &oa, &iostatus, NULL, FILE_ATTRIBUTE_NORMAL, 0, FILE_OPEN_IF, FILE_SYNCHRONOUS_IO_NONALERT, NULL ) The same code works fine when called from DriverEntry(...) or AddDevice(... thanks, da Tag: How to Set default audio device? Tag: 44272
  - 22
    - "welcome to the found new hardware wizard" Hi All, i am trying to re-enumerate the devices on a system. If the user has uninstalled the device by going in the device manager it doesnt show up in SetUpAPIXXX calls. Anytime i re-enumerate the devices if any devices do not have drivers installed then the "welcome to the found new hardware wizard" comes up on WIN2k and WINXP. Is there any way to suppress this wizard or is there any way of enumeration so that i can see all the disabled present devices but dont invoke this wizard. Sunny. Tag: How to Set default audio device? Tag: 44270
  - 23
    - USB 2.0 Drivers Hi there, I bought a Gigabyte GA-81K1100 Motherboard about 5 months ago and during installation of drivers, the Gigabyte software told me to get the USB drivers from Microsoft. I have been to both Microsoft and Gigabytes' sites with no luck. The Gigabyte site still tells me to go to Microsoft. Does anyone know where I can get this driver? Many thanks Tag: How to Set default audio device? Tag: 44269
  - 24
    - .c or .cpp Why are drivers are written in .c (may be mostly in .c or only .c) Can C++ not be used for writing a device driver ? Thanx. Tag: How to Set default audio device? Tag: 44244
  - 25
    - New bie tutorial. Since i am newbie in writting a device driver, so i was look ing for some good tutorial that i can read before i get a good book on DD (book by Art baker I suppose). any ways if any one is interested here is a link i found quite usefull. http://www.rivier.edu/faculty/amoreira/web/cs690b03/tut1/ Tag: How to Set default audio device? Tag: 44243
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  - 1
    - calling ExReleaseResourceLite Hi Is it ok to call ExReleaseResourceLite without calling ExAcquireResourceSharedLite before it? this might happen if exception occurs and I want to make sure that I release the resource but at this point I have no way to know if it has been acquired. Thanks Tag: How to Set default audio device? Tag: 44234
  - 2
    - INF file RegisterDlls section - failing within a CAB file! I have a dead simple INF file that installs a dll on a user's machine and registers it. If I right click the INF file and select "install" then everything is fine If I wrap the INF and the DLL in a CAB file (signed) and use the HTML OBJECT tag within an HTML page, then the DLL is copied to the user's pc, but NOT REGISTERED Any ideas on where I'm going wrong here Code ;------------------------------------------------------------------------ [Version Signature = "$Chicago$ [DefaultInstall CopyFiles = LaunchInIE_CopyFile RegisterDlls = LaunchInIE_RegisterDLL [SourceDiskNames 1 =, "Common Files", [SourceDiskFiles LaunchInIE.dll = [DestinationDirs LaunchInIE_CopyFiles = 1 [LaunchInIE_CopyFiles LaunchInIE.dl [LaunchInIE_RegisterDLLS 11,,LaunchInIE.dll, ;------------------------------------------------------------------------ any help is greatly appreciated!! Tag: How to Set default audio device? Tag: 44233
  - 3
    - how to determine DeviceName for serial PDO hello how i can to determine DeviceName (may be the term "DeviceName" is wrong, but i looking for the method of how to get the string "\Device\Serial0") for serial PDOs. the PDOs is known. thank you. Tag: How to Set default audio device? Tag: 44232
  - 4
    - NDIS Miniport install problem Hi I am developping a NDIS miniport with a WDM lower edge, based on the NDISWDM sample The problem I am encountering is at the driver installation (it happens both with my driver and with the sample driver) : using WinDbg and Windows 2000 checked build 2195, I can see the DriverEntry being accessed and returning NDIS_STATUS_SUCCESS but, instead of entering my miniport InitializeHandler, I obtain the following message in WinDbg -------------------- *** Assertion failed: FALS *** Source File: D:\nt\private\ntos\ndis\ndis\initpnp.c, line 30 Break, Ignore, Terminate Process or Terminate Thread (bipt) -------------------- If I choose to (I)gnore, then the miniport Unload handler is called Any idea Olivier Tag: How to Set default audio device? Tag: 44220
  - 5
    - USB Selective Suspend win 2000 Hi All I was wondering if there is a ms solution to implementing the winXP usb selective suspend on win 2000 and win98. If not does anybody know of a USB stack provider that supports this functionality Your Brendan. Tag: How to Set default audio device? Tag: 44218
  - 6
    - puzzle on PoSetPowerState() in DDK POWER_STATE PoSetPowerState ( IN PDEVICE_OBJECT DeviceObject, IN POWER_STATE_TYPE Type, IN POWER_STATE State ); according to DDK, DeviceObject Points to the target device object. Type Indicates whether to set a system or a device power state. Drivers must specify DevicePowerState. State Specifies the power state to be set. Drivers must specify an enumerator of DEVICE_POWER_STATE: PowerDeviceD0, PowerDeviceD1, PowerDeviceD2, or PowerDeviceD3. "Drivers must specify DevicePowerState",what does this sentence mean? it means the second parameter must be DevicePowerState or we have to set device power state to a value ,such as D3 ? Tag: How to Set default audio device? Tag: 44217
  - 7
    - can root enumerated device resume after hibernate on win2000? I have written a pnp style driver for a root enumerated legacy reader .It is attached to serial port.All works well but hibernation,system can not resume after hibernation. I have recorded card status before hibernation in the power dispatch routine. Any thing else should be done to this driver while hibernating ?such as save serial port status. Tag: How to Set default audio device? Tag: 44216
  - 8
    - NDIS IM Passthru Driver with PP/SLIP/USB/Bluetooth / WLAN Hi, I want to make the passthru driver work with PPP, SLIP, Bluetooth , WLAN interfaces. Could anyone help me out on what all changes are required for me to catch all the packets coming from these interfaces ?? Thanks Ashish Tag: How to Set default audio device? Tag: 44215
  - 9
    - SetupDiSetDeviceRegistryProperty Can anyone tell why +1+1 ?? I have tried other value but failed. if(!SetupDiSetDeviceRegistryProperty(DeviceInfoSet, &DeviceInfoData, SPDRP_HARDWAREID, (LPBYTE)HardwareId, (lstrlen(HardwareId)+1+1)*sizeof(TCHAR))) ) Tag: How to Set default audio device? Tag: 44213
  - 10
    - Encrypt/Decrypt all packets I want to write a device driver that encrypts all the packets coming from the application layer. I think it should lie between the application layer and the transport layer(TCP,UDP,etc...). Am I right I read MSDN and DDK help. But I cannot find anything for the beginners. What will I implement? Miniport? TDI? NDIS? or Can I do it in user mode just under the application layer Just guide me about what should I read for a quick start Thank Ken Tag: How to Set default audio device? Tag: 44212
  - 11
    - StartIo lower IRQL to PASSIVE_LEVEL Hi A driver's StartIo routine executes at IRQL = DISPATCH_LEVEL. Is it OK to lower the IRQL to PASSIVE_LEVEL in order to call routines that can only be called at PASSIVE_LEVEL such as MmmapIoSpace Thanks Danie Tag: How to Set default audio device? Tag: 44204
  - 12
    - My first Device Driver Dear Sirs We are porting device control software from MSDOS to Windows and need to use the DDK (Driver Developer Kit) to update the driver The device is an PC based Ionosonde (Ionospheric Sounder) and an Interface Card is used rather than the Serial Port. The idea is that MSDOS is very limited as far as remote control of a device over a network so we need to port to Windows Being a novice I would appreciate any advice on how to get started with the DDK Suite 3 that we ordered from Microsoft. Also I would like to find sample code for a device driver via an Interface Card Cheers Tag: How to Set default audio device? Tag: 44203
  - 13
    - PCI Bus driver for devices on secondary side of a Bridge. Does PCI bus diver also enumerates and ceates PDO's of the devices on the Secondary side of PCI-PCI bridge or a specfic PCI bus driver needs to be developed? Tag: How to Set default audio device? Tag: 44192
  - 14
    - Why is pMdl->Size negative? Hi When I try to create an MDL for a user memory using IoAllocateMdl(...), the returned pMdl is valid, but pMdl->Size is negative. Does anyone know what is wrong here? I tried 20MB and it worked. But when I tried 32MB, it failed with a negative value for pMdl->Size and valid pointer for pMdl THanks joh Tag: How to Set default audio device? Tag: 44176
  - 15
    - controlling windbg - multiple threads are inflicting pain I've narrowed some very bizzare behavior from windbg to the problem that I'm seeing multiple threads run into my breakpoints while I'm trying to single step through code. Is there anyway to prevent this? Symptomatically, while trying to single step through code it looks like the debugger is just hopping around, but when I do a !thread command after each hop, I'm looking at a different thread I'm certain this is not desireable behavior Help Tag: How to Set default audio device? Tag: 44175
  - 16
    - [Q] How to get the information of BSSID_LIST which structure was 802.11 NDIS_802_11_BSSID_LIST_EX. [Q] How to get the information of BSSID list which structure was 802.11 NDIS_802_11_BSSID_LIST_EX. Dear all, I've tried to get BSSID lists using ¡°IWBemServices¡± API at WinXP. And I can get the array of object - MSNdis_80211_WlanBssid-. However, I can't get the detail information from it because CIM object manager treated it as NDIS_802_11_BSSID_LIST not NDIS_802_11_BSSID_LIST_EX structure even if it was NDIS_802_11_BSSID_LIST_EX. As a result, the information what I got was very invalid. I could confirm the invalidity by CIM studio as well. Please let me know how to get the information of BSSID lists which structure were NDIS_802_11_BSSID_LIST_EX. I hope, I could get a bssid lists buffer which is a c style structure of NDIS_802_11_BSSID_LIST_EX. Thank you. Have a nice week. (I will post this at microsoft.public.win32.programmer.wmi and microsoft.public.dotnet.framework.wmi as well) //Daum Tag: How to Set default audio device? Tag: 44174
  - 17
    - (Re:) A whole lotta WRITE_REGISTER_ULONG (Sorry for replying so late - vacation, and then I forgot about it. Also sorry for not replying correctly - Google won't let me.) * Mark Roddy: > "Tim Roberts" <timr@probo.com> wrote in message > news:jm6550lhddfpeedpegg872ub9jemop5j1e@4ax.com... > > thojens@gmx.de (Thorsten Jens) wrote: > > > > > >In my ISR, I call WRITE_REGISTER_UNLONG() a lot (>8000 times). I tried > > >to speed things up a bit by using WRITE_REGISTER_BUFFER_ULONG(), but > > >found out the hard way that this does not do what I need (Could > > >somebody please put the obvious misunderstanding into the > > >documentation? That would be great.). > > > > Did you eventually learn the difference? WRITE_REGISTER_BUFFER_ULONG is > > just like "rep movsd" -- it bumps the destination address for each write. Yes, I found out after debugging my constantly-crashing driver. I still think that this behavior should be documented IN BOLD PRINT. > > >I googled a bit, and found something like this: > > > > > > for (all values but the last one) { > > > *((PULONG)(base + reg_offset)) = value; > > > } > > > WRITE_REGISTER_ULONG(bae + reg_offset, last_value); > > > > > >which is supposed to be faster because it avoids flushing the CPU > > >cache after each written value but the last one. Is this method > > >reliable? > > > > Where did you read that? > > He probably read it from an article I wrote for the NtInsider quite a few > years ago. That's indeed where I got it from. > I stand by what I wrote, with the exception that the volatile > should indeed be included. OK, I read the thread now. I'll do some measurements and see which version suits me best. Thanks, everybody! Thorsten Tag: How to Set default audio device? Tag: 44171
  - 18
    - filter driver and kernel streaming Hallo I'm new in kernelk straming. I must add to my USB Devive driver new funcionality - translate data stream to wav and making my device visible as wave source (like microphone port on sound card) Now I have standard function driver for my device. I think that i can write filter driver to add new functionality, but I have 3 question: 1. Can I use stream.sys driver (part of KS) to write my upper filter driver. 2. How to write inf file for install upper filter driver ???. Can I add this to inf file used to install function driver. Tag: How to Set default audio device? Tag: 44170
  - 19
    - KeDelayExecutionThread I have a driver that must handshake bytes across an interface, and must poll a hardware register before sending each byte. I currently am using KeDelayExecutionThread() to delay so that hopefully the driver is not consuming all of the cpu cycles. Is this an acceptable technique? If so, should the WaitMode argument to KeDelayExecutionThread() be UserMode or KernelMode? The DDK recommends UserMode if the wait is a "long term wait". What constitutes a "long-term wait" ???? The DDK also says "Lower-level drivers should specify KernelMode". What does it mean by "lower-level driver? What is the minimal Interval (# of 100 nsec periods) I can specify in KeDelayExecutionThread() ? Tag: How to Set default audio device? Tag: 44167
  - 20
    - Filter driver for CD Read/Write activity Dear Sir, I want to know whether is it possible to monitor Read/Write activity of CD by writing a kind of filter driver? Like File system filter driver is there to monitor Read/Write of file activities.Similar thing i want to do for CD-ROM also. Plz reply. regds vinay Tag: How to Set default audio device? Tag: 44164
  - 21
    - Trouble installing driver from install program. Hi. I have a driver based off the fakemodem.sys example driver in the DDK. It installs ok from the modem control panel, however I need to do it with an install program because some registry entries need to be written that will be read later by the driver. I am basing my install program off Walter Oneys FastInst and have a problem at the UpdateDriverForPlugAndPlayDevices step. GetLastError returns E000022D which is ERROR_NON_WINDOWS_NT_DRIVER. If I skip that step, I can reboot and I get a dialog asking me to show it the driver, if I do then I get the error "This driver does not support Windows XP". This is wrong because it (the .sys) was compiled with the XP DDK. If I look in the setupap.log file it has that error message for both cases, using the UpdateDriverForPlugAndPlayDevices function and the reboot, dialog box method. In setupapi.log it say, this driver does not support windows xp. It is not even looking at the .sys however, there must be something in my .inf file preventing windows from installing my driver. Any ideas? The same .inf file works fine when installing from the Add Modem control panel option. I am a MSDN Universal customer if this helps. Thanks Kurt Häusler Integer Software Tag: How to Set default audio device? Tag: 44162
  - 22
    - =?ISO-8859-1?Q?Probl=E8me_connexions_USB_depuis_la_MAJ_SP1_sur_XP?= Salut à tous, je rencontre le fameux pb de reconnaissance des périphériques USB depuis la mise à jour SP1 de windows XP. Scanner, App. photos, etc... sont désormais introuvables par le système. J'ai beau installer les MAJ pour USB 1 et 2 mais rien ne change... Si qq'un pouvait m'aider... Merci Tag: How to Set default audio device? Tag: 44158
  - 23
    - how can i get the suitable port name ? I create a virtual com to serial port driver , but there is a problem to get the port name (com x) I get the port name by counting SerialCOMM entrys in registry. somehow , it will be difference with the DeviceManager results. ex : DeviceManager show the name "COM4" in control panel, but "COM3" is my result. how could i do to get a port name as DeviceManager's.?? bear Tag: How to Set default audio device? Tag: 44153
  - 24
    - Allocating aligned memory blocks in WDM Hi ev' one. I have one question. PLX9054 requires descriptors have to be aligned at 16 byte boundary. I allocate memory for descriptors by ->DmaOperations->AllocateCommonBuffer(). This requirement may be satisfied by allocating additional 15 bytes at end of descripttors block and performing manual alignment. Is there more "good" way to allocate aligned memory in such situation (WDM). Tag: How to Set default audio device? Tag: 44151
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    - Path to current kernel's image file on disk? Path to current kernel's image file on disk? Anyone know how to determine this on Windows 2000 or other NT-based system? Tag: How to Set default audio device? Tag: 44150

Hello to all,

I need your help. I'm programming in VC++ and I need to change the default
audio device in Windows98, 2000 and XP.

I've found a function that returns the ID of the preferred audio device
(waveoutmessage) but I need to change the preferred audio device.

I don't know how to do that... may be It can be done through the registry...

Thank you.

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