IoAttachDevice problem

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  - 1
    - DrvDocumentPropertySheet() fucntion call Hi All, Can anyone tell me the difference between calls to DrvDocumentPropertySheets() from printer control panel and file/Dialog box(Application.) Because if it's a call from printer control panel,then all the current settings should be saved to registry. And if its a call from file/dialog box then current settings should be maintained through static variables. How to identify that, the call is from control panel or application? Thanks in advance. Tag: IoAttachDevice problem Tag: 79633
  - 2
    - IoGetDeviceObjectPointer and WdfRequestGetFileObject I am currently converting my WDM+DriverWorks drivers to KMDF. I have two drivers. The master driver(DeviceA) uses WDM+DriverWorks. The slave (DeviceB) has been converted to KMDF. DeviceA uses KLowerDevice (which embedds an IoGetDeviceObjectPointer call) to establish the connection between DeviceA and DeviceB. IoGetDeviceObjectPointer succeeds. DeviceA then builds a IRP_MJ_DEVICE_CONTROL itp to communicate with DeviceB. DeviceB receives the control code but WdfRequestGetFileObject returns NULL. If I use an user application to send the same control code to DeviceB, WdfRequestGetFileObject returns a valid WDFILEOBJECT. According to the KMDF documentation, WdfRequestGetFileObject will fail if a) Your driver has not called WdfDeviceInitSetFileObjectConfig and specified a WDF_FILEOBJECT_CLASS value that causes the framework to create file objects. >> I do call WdfDeviceInitSetFileObjectConfig in my EvtDriverDeviceAdd callback and the call does not fail when the user application runs. b) Another driver sent a read, write, or I/O control request to your driver without first sending a request type of WdfRequestTypeCreate. >> I have a trace statement in EvtDeviceFileCreate and the event is firing so DeviceA is sending the WdfRequestTypeCreate. Thanks for the help! Chris Grove Tag: IoAttachDevice problem Tag: 79626
  - 3
    - Printer Spool File Name In earlier versions of Windows, a printer spool name was in the form of XXXXX.SPL. Print Data being saved in directory \windows\system32\spool\printers. XXXXX were 5 decimal digits, equal to the jobid found in structure JOB_INFO_2. In my last version of Window XP-sp2, file names are now in the form FPXXXXX.SPL and the XXXXX value does not match any more with the "JobId". Strangely enough, if for a specific printer "Advanced Properties", function "Keep printed documents" is activated, the structure of printer spool name is back to the older version (5 decimal digits = JobId). Could somebody be so kind to tell me how to predict the Printer Spool File Name, for a specific "JobId". Many thanks. Tag: IoAttachDevice problem Tag: 79622
  - 4
    - Easilly replace a Device Drive? I was asked to: 1. Verify if the correct Device Driver is installed. 2. If not - replace said driver by another one. My clientâ??s product is recognized as a â??Standard Deviceâ?? and Windows install a default driver not working with the product. The user must install the software first, but of course many do not read the manual ;) The product is done, ready to deliver, so the solution needs to be somewhat of a patch. I have never done such low level development (mainly end-user applications, GUI, and interfaces for DB) so I am not sure where to start; I am trying to avoid the DDK, I am hopping for a quick solution with a simple verification in the registry, and call some Windows API update/install functions. Does it make sense? Do I absolutely need the DDK? Where do I start? (A few functions of the API usually gets me started) Anyone can give me direction? Thanks to all, GG Tag: IoAttachDevice problem Tag: 79618
  - 5
    - Any solution to "error LNK2019: unresolved external symbol __imp__RtlInitUnicodeString@8" Hi, I have the following code: ----------------------------------------------------------------------------- OBJECT_ATTRIBUTES myObjectAttr; UNICODE_STRING myObjectName; RtlInitUnicodeString(&myObjectName, L"\\??\\d:\\output.txt"); InitializeObjectAttributes( &myObjectAttr, &myObjectName, OBJ_KERNEL_HANDLE|OBJ_FORCE_ACCESS_CHECK, NULL, NULL); ----------------------------------------------------------------------------- AND getting this error with standart build -Cz. Any help. Thanks beforehand ----------------------------------------------------------------------------- Linking Executable - disp\objchk_wxp_x86\i386\mirror.dll for i386 errors in directory c:\winddk\3790~1.183\src\video\displays\mirror\disp disp\enable.obj : error LNK2019: unresolved external symbol __imp__RtlInitUnicod eString@8 referenced in function _DrvEnablePDEV@44 disp\objchk_wxp_x86\i386\mirror.dll : error LNK1120: 1 unresolved externals BUILD: Linking c:\winddk\3790~1.183\src\video\displays\mirror\mini directory BUILD: Done 2 files compiled 1 executable built - 2 Errors Tag: IoAttachDevice problem Tag: 79617
  - 6
    - Get file handle to all USB storage devices I need to get a file handle to only the USB storage drives on my system. So, I know I need to do a Createfile("\\\\.\\PhysicalDriveX"... but, how do I determine that PhysicalDriveX is of type USBSTOR\DISK. I've browsed through the SetupDi functions and the devcon.exe source code, but I don't see how I can tie the two together. Any suggestions? Thanks in advance... -Brett Tag: IoAttachDevice problem Tag: 79615
  - 7
    - 32 bit WinDbg on host debugging 64 bit driver on target Hi all Has anyone else noticed that WinDbg cannot display addresses correctly when debugging a 64 bit target driver on a 32 bit host? Tag: IoAttachDevice problem Tag: 79601
  - 8
    - Help needed for development of SDIO drver on WinXP Hi all, I'm new to SDIO drivers and developing one WLAN device using Win2k3 server SP1 DDK. Is there any sample code available to jump start on the driver development ? I've heard about the Yokogawa SDIO sniffer (or analyzer). Where can i get it ? Any pointer is appreciated. Regards Esha Tag: IoAttachDevice problem Tag: 79600
  - 9
    - How to accesss memory map io register? Hi all, I have a problem. I have mapped my memory io register but I do not know how to read and update a particular io register. For example: My memory mapped io register: offset 0 to 1 is Host control setting offset 2 to 3 is host status offset 4 to 5 is interrupt line If you want to read/update offset 2 to 3, how to do in C code? mmadd = MmUnmapIoSpace(pdx->pMmAdd, 5); Thanks. HS Phuah Tag: IoAttachDevice problem Tag: 79599
  - 10
    - USBD behavior on surprise removal HI, MYusb function driver starts an i/o operation only after the earler one has completed i.e. the USBD has only one IRP pending at any time. Do I need to support IRP cancellation for this scenario. What I would like to know what happens if the user yanks out the usb device while the IRP is being procesed by the bus driver. The active IRP gets completed with an error status or the IRP remains pending. Does my device object get deleted? I guess no because it still has one reference to it? What happns if the user yanks out the device and puts it back again in a matter of few seconds. What I sometimes see that I now have two device objects which is something I don't want as I support only one device at a time. What should I do to avoid have two device objects. Does cancelling IRPs when surprise removal happens helps to solve this problem. Please guide me to any KB article on the behavior of USBD upon surprise removal and and an IRP active at the same time. I tried to find an exact answer but couldn't get it in DDK. Regds. Nitin Tag: IoAttachDevice problem Tag: 79598
  - 11
    - How to detect USB connect or not at Windows 98/ME ? Hi all, My AP need to know device connect status at Windows 98/ME. Is possible to know USB connected or not by checking Registry Key ? Thanks for any hint. Tag: IoAttachDevice problem Tag: 79595
  - 12
    - Forcing spool files to contain EMF Hi again, After reading some material on printers, and asking questions in forums, I am still confused. So I thought I might try to rephrase my question and get a better answer. My final goal - Get an EMF from EVERY print that is issued (on every printer installed and from every application), analyze it, and stop or resume the print. I know EMF is undocumented, but these are my requirements so I want to stick to it in the meantime. My idea was to somehow make sure all spool files will contain EMF and not text or RAW. (And extract the EMF from the spool file) If I'll send all prints through a dummy printer driver (maybe I'll change in the registry and put my printer driver for all installed printers) which is local and always uses "Advance printing features" (set from the code) I should accomplish this? Is there another possibility? After I analyze the EMF, if I decide so, I can resend the spool file to a real printer to be printed. (Using OpenPrinter and WritePrinter). Again, this solution has to work on both local and network printer (eventually, I need the EMF on my system not on a remote one) Thanks. Tag: IoAttachDevice problem Tag: 79594
  - 13
    - KS filter driver fails remove data format Hi, I am trying to build a video capture filter driver upon on webcam WDM driver. I need to remove some format such as MJPEG for post image processing. Now I encountered a problem. >From the MSDN of KS Data Formats and Data Ranges, KS filter reports all dataformat information thru KSPROPERTY_PIN_DATARANGES and KSPROPERTY_PIN_CONSTRAINEDDATARANGES. And clients use KSPROPERTY_PIN_PROPOSEDATAFORMAT and KSPROPERTY_PIN_DATAINTERSECTION to quest the format supportted status. In IRP complete routine, I did get the stream class returned datarange information at KSPROPERTY_PIN_DATARANGES , then I removed the format as following case KSPROPERTY_PIN_DATARANGES: if(lOut){ PKSDATARANGE pDataRange; PKS_DATARANGE_VIDEO pdataRangeVideo; PKSMULTIPLE_ITEM pKsMI; PKS_VIDEOINFOHEADER pKsVideoIH; ULONG i; // SystemBuffer is used to transfer the returned supportted fomat. pKsMI = (PKSMULTIPLE_ITEM) pSys; pKsMI->Count = 5; //Note that totle color format has 10 items pKsMI->Size = 1488; pDataRange = (PKSDATARANGE) ((PBYTE)pKsMI + sizeof(KSMULTIPLE_ITEM)); for(i=0; i< pKsMI->Count; i++) { pDataRange->Flags = PinDefaultDataRanges[i]->Flags; pDataRange->FormatSize = PinDefaultDataRanges[i]->FormatSize; pDataRange->Reserved = PinDefaultDataRanges[i]->Reserved; pDataRange->SampleSize = PinDefaultDataRanges[i]->SampleSize; memcpy(&pDataRange->MajorFormat, &PinDefaultDataRanges[i]->MajorFormat, sizeof(GUID)); memcpy(&pDataRange->SubFormat, &PinDefaultDataRanges[i]->SubFormat, sizeof(GUID)); memcpy(&pDataRange->Specifier, &PinDefaultDataRanges[i]->Specifier, sizeof(GUID)); pDataRange = (PKSDATARANGE)((PBYTE) pDataRange + pDataRange->FormatSize); } } else Irp->IoStatus.Information = 1488; break; In the KSPROPERTY_PIN_DATAINTERSECTION, similar modificatin is made. But after that, amcap can not preview, it reports "Error 80004002: Cannot find VCapture:IAMStreamConfig", followed with "This graph cannot preview" message. I can not found the reason for this failure. Can anyone tell me the clue to resolve this problem? How to change the dataformat in the video capture upper filter driver? Thanks in advance! Tag: IoAttachDevice problem Tag: 79586
  - 14
    - STATUS_WDF_FORWARDED and KMDF 1.1 I have a driver that compiled fine under 01.00.5054, that is now giving me grief under KMDF 1.1. Among other things, the status STATUS_WDF_FORWARDED has disappeared. Instead, the call to WdfRequestForwardToQueue, simply returns STATUS_SUCCESS, if successful. While I understand that this is consistant with a lot of the DDK, I (of course) have conditional logic that does not complete the IRP if the request has been successfully forwarded. What's the best way to handle this now? G Tag: IoAttachDevice problem Tag: 79573
  - 15
    - RDR bug? The scenario: 1) Two different CDs with different \autorun.inf on them. In other words, the file names are the same, the content differ. 2) Two PCs in a LAN, the server and client 3) The CD drive on the server is shared; it's just a normal share with default settings. 4) Insert CD1 on the server. 5) Open and read \\Share\CD\autorun.inf on the client. All is OK. 6) Eject CD1, insert CD2. 7) Open and read \\Share\CD\autorun.inf. Now either CreateFile() fails with Win32 error 34 (ERROR_WRONG _DISK), or ReadFile() returns the old content from CD1. I can open all other files just fine, but not the files with the same name which were opened previously. Say, if I have \setup.exe on both CD1 and CD2, but I didn't open setup.exe at step 5, I can access CD2's setup.exe on step 7. How can flush the RDR cache on the client programmatically, instead of having to reboot the server or recreate the share every time? Thanks. A. Tag: IoAttachDevice problem Tag: 79568
  - 16
    - What is the best strategy to retrieve data from video driver? I am Hi, I am trying to retrieve basic data from video driver via ExtEscape. But the problem is I am getting blue screen of death. I have a data structure typedef struct _DispCmdQueue { RECTL queue[2000]; INT queueHeadIndex, queueTailIndex; INT queueSize; } RectQueue, *PRectQueue; In the main function I am creating a RectQueue rectQueue; Then I am calling the driver ExtEscape(hdc,0,0,NULL, sizeof(rectQueue), (char *)&rectQueue); And in the driver I am trying to set one field of the structure like that ULONG DrvEscape( IN SURFOBJ *pso, IN ULONG iEsc, IN ULONG cjIn, IN PVOID pvIn, IN ULONG cjOut, OUT PVOID pvOut) { PRectQueue userPRectQueue = (PRectQueue) pvOut; userPRectQueue->queueTailIndex = 1; } But I am getting blue screen and machine needs reboot. Any suggestion. Sincerely, Omer Tag: IoAttachDevice problem Tag: 79564
  - 17
    - Winqual: Error encountered during new submission creation Hello I have been trying rather unsuccessfully to create a new submission for the last few days. After I add the test logs I receive an error message " ...does not appear to contain valid logs for the selected operating system" All tests have passed and the Submission viewer doesnt not indicate any problems either Has anyone experienced a similar problem.... ? Is there a problem with creating the cab files if you have a dual boot machine .... and the OS and HCT are not installed on the C drive ? Does the winqual site have a problem with the inf in the parent directory and drivers for x86/x64 listed in sub directories (e.g., Parent dir (xxx.inf) subdir x86 (xxx.sys for x86) subdir x64 (xxx.sys for x64) ) Any help would be appreciated Thanks --rr Tag: IoAttachDevice problem Tag: 79561
  - 18
    - DevCon Sample Hi I am looking for sample code that makes use of the DevCon application to enable/disable devices I look for the following methods: Using DevCon Classes and ListClass method to list to the user the list of devices (not all) in a readable format Based on the data returned from the DevCon, retrieve the device specific data to use later to enable/disable that device (something like Hardware ID) Thank you, Samuel Tag: IoAttachDevice problem Tag: 79558
  - 19
    - Listening to broadcasts for a port using TDI Hi, I'm attempting to write a function for a kernel driver of ours that will listen for a UDP broadcast on a specified port. I'm attempting to communicate with a device on the network that when given a directed UDP packet on a specified port unfortunately responds with a UDP broadcast to a different port. I tried to do an IoCallDriver call with an IRP created with TdiBuildQueryInformation and a QType of TDI_QUERY_BROADCAST_ADDRESS to obtain the broadcast address of the local-node. I get a status of STATUS_CANCELLED returned. I have many functions in our kernel drive that can communicate via UDP and TCP successfully, but I can't seem to create a connection to the local broadcast address. These functions work with abstract "Sockets". I know there are no sockets like in WinSock2 in the kernel space, but our functions use this concept via the IoGetDeviceObjectPointer call, etc., etc.. So I have a function that will successfully create a "Socket" and with this "Socket" I try to: 1. Find the local-node broadcast address via TdiBuildQueryInformation. (Unsuccessfully.) 2. Attempt to bind to 0xFFFFFFFF and setup a TDI_EVENT_RECEIVE_DATAGRAM event handler. I see the broadcast using Etherpeek, but the event handler is never fired. So I know that the code I have that creates a "Socket" works because I use it all over the driver code and it works. However, I'm not sure if I have to create the "Socket" a little different because I want to use it to accept broadcasts. I know that in WinSock2 you have to open the socket and prime, or set the broadcast option, to use broadcasts. It would seem logical that there was some sort of priming needed in the kernel space using TDI also. Any help on this subject would be much appreciated. Thanks, -David G Tag: IoAttachDevice problem Tag: 79555
  - 20
    - one more question about DEVMODE private data Hello! Has anybody ever used DEVMODE private data to transfer some data from one to another module? I found out that there are some problems. To fill private members I use the following: PCBUSERDATA pUserData = (PCBUSERDATA) pCallbackParam->UserData; POEMDEV pOEMDev = (POEMDEV)pUserData->pOEMUIParam->pOEMDM; pOEMDev->>dwDriverData = 1; pOEMDev->>dwDriverData1 = 2; The field dmDriverExtra of DEVMODE has strange value. And there is trash in the following address: PVOID pvDriverData = (PVOID) (((BYTE *) pdm) + (pdm->dmSize)); where pdm is a starting address of DEVMODE structure. Can you help me? Thank you. Tag: IoAttachDevice problem Tag: 79549
  - 21
    - Programatically make the Network Interface Card led flash Most of the RJ45 connector on netword card now have two led. We bought a Intel Pro/1000 MT dual port adapter. It came with the ProSet software. One nice feature of this software is a botton to make one of the two led on the RJ45 connector flashed for 120 second to help identify the card. How can i use this feature in a c++ program. Also is it possible to do the same thing in onboard NIC. Most of the DELL and IBM computer use BroadCom NetXTreme chip as their NIC. A i would like to control one of these led. Thanks. Tag: IoAttachDevice problem Tag: 79547
  - 22
    - Error while accessing Video Mini Port Driver Hello, I've been searching for a long time to get an information about I2C interface function calls. I am trying to send DDC commands over I2C bus to Monitor. I've used WDM Src\WDM\...\ATIShare source code template to do this. With the code, given below, I am able to get I2COpen & I2CAccess function pointers from Video Adapter.(that supports I2C Interface) But calling I2COpen function always fails and returns 0xC00000C2 error code. It is defined in ntstatus.h as #define STATUS_ADAPTER_HARDWARE_ERROR ((NTSTATUS)0xC00000C2L) There is no documentation available for this. Does anyone have any information about the sequence of calls to be issued to access the I2C Interface? Any help is appreciated. I'm calling LockI2Cprovider function after LocateAttachI2CProvider function call. The program fails in LockI2Cprovider () function. BOOLEAN LocateAttachI2CProvider( PDEVICE_OBJECT pVideoDeviceObject, PI2C_CONTEXT pstI2CContext ) { PIRP pIrp; BOOLEAN bResult = FALSE; PIO_STACK_LOCATION pNextStack; NTSTATUS ntStatus; KEVENT Event; I2CINTERFACE* pI2CInterface; if (pVideoDeviceObject == NULL || pstI2CContext == NULL) { return FALSE; } pI2CInterface = pstI2CContext->m_i2cProviderInterface; if (pI2CInterface == NULL) { return FALSE; } pIrp = IoAllocateIrp (pVideoDeviceObject->StackSize, FALSE); if( pIrp == NULL) { return FALSE; } pNextStack = IoGetNextIrpStackLocation (pIrp); // original if (pNextStack == NULL) { return FALSE; } pIrp->IoStatus.Status = STATUS_NOT_SUPPORTED; pNextStack->MajorFunction = (UCHAR)IRP_MJ_PNP; pNextStack->MinorFunction = IRP_MN_QUERY_INTERFACE; KeInitializeEvent( &Event, NotificationEvent, FALSE); IoSetCompletionRoutine ( pIrp, I2CScriptIoSynchCompletionRoutine, &Event, TRUE, TRUE, TRUE); pNextStack->Parameters.QueryInterface.InterfaceType = (struct _GUID *) &GUID_I2C_INTERFACE; pNextStack->Parameters.QueryInterface.Size = sizeof( I2CINTERFACE); pNextStack->Parameters.QueryInterface.Version = 1; pNextStack->Parameters.QueryInterface.Interface = (PINTERFACE) pI2CInterface; pNextStack->Parameters.QueryInterface.InterfaceSpecificData = NULL; ntStatus = IoCallDriver (pVideoDeviceObject, pIrp); if( ntStatus == STATUS_PENDING) { KeWaitForSingleObject( &Event, Suspended, KernelMode, FALSE, NULL); } if ((pI2CInterface->i2cOpen == NULL) || (pI2CInterface->i2cAccess == NULL)) { return FALSE; } else { DebugPrint ("deviceInfo->m_i2cProviderInterface->i2cOpen 0x%x", pI2CInterface->i2cOpen); DebugPrint ("deviceInfo->m_i2cProviderInterface->i2cAccess 0x%x", pI2CInterface->i2cAccess); } pstI2CContext->m_pdoDriver= pVideoDeviceObject; bResult = TRUE; if( pIrp != NULL) IoFreeIrp( pIrp); return bResult; } BOOLEAN LockI2CProvider (PI2C_CONTEXT pstContext) { NTSTATUS status; if ((pstContext->m_i2cProviderInterface->i2cOpen == NULL) || (pstContext->m_i2cProviderInterface->i2cAccess == NULL) || (pstContext->m_pdoDriver == NULL)) { return FALSE; } pstContext->i2cAccessBlock->Status = I2C_STATUS_NOERROR; status = pstContext->m_i2cProviderInterface->i2cOpen ( pstContext->m_pdoDriver, TRUE, pstContext->i2cAccessBlock); if (status != STATUS_SUCCESS) { DebugPrint ( "CI2CScript: LockI2CProvider() status = 0x%lx\n", status); return FALSE; } pstContext->m_dwI2CAccessKey = pstContext->i2cAccessBlock->dwCookie; DebugPrint ("LockI2CProvider m_dwI2CAccessKey %ld", pstContext->i2cAccessBlock->dwCookie); return TRUE; } Thanks VK Tag: IoAttachDevice problem Tag: 79538
  - 23
    - I want to capture keystokes at first Hi, I am working on windows driver develpoment for USB keyboard. Data from UHC comes in form of usb packets i.e URB. Can anyone please tell me where i will get exact data or characer from URB at first. Whether i can capture exact data(character) at first in hidusb.sys/hidclass.sys/kbdhid class mapper driver or in some other driver? Please give me necessary inputs regarding this. Thanks in advance, nash -- nash ------------------------------------------------------------------------ Posted via http://www.codecomments.com ------------------------------------------------------------------------ Tag: IoAttachDevice problem Tag: 79533
  - 24
    - Win98 Smartcard Reader Hot plug-in problem My Win98 USB Reader driver works well if USB reader plugged before Win98 boot. But if I plugged reader after Win98 boot, seems pc/sc manager couldn't talk to driver correctly. From driver debug, I found all driver PnP enumerate IRP worked well, but driver couldn't get smartcard service request. I wonder if pc/sc manager support USB reader hot plug-in in Win98? Tag: IoAttachDevice problem Tag: 79527
  - 25
    - HCT12.1 DrverPath Test got 0x000000C4(0x00000090...) Bluescreen Hello Everyone: I run HCT12.1 DevicePath Test for my smartcard reader driver, it got bluescreen with 0x000000C4(0x00000090..) message. But if I run DDK tool dc2.exe in command line for my driver, like: dc2 /hct /dr drivername. It PASSED. What's the different between these two kinds of tests?? When I got BS, how to use the dump file ? I have tried to open dump file in windbg, it returned"symbol not found", I have added pdb file into the "symbol path". Any more setting I need ? Thank you for everyone's attention! Tag: IoAttachDevice problem Tag: 79525
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  - 1
    - "KsPinGetFirstCloneStreamPointer" is failing Hello, I am writing AVstream minidriver and new to direct show. I am using "KsPinGetFirstCloneStreamPointer" function to clone stream buffer and Its some time its failing and some times its not. 1) What are the reasons for failing this fucntion? 2)A Basic question why it is required to clone? Please help me out to get answers to these question. Thanks and Regds, Darshan Tag: IoAttachDevice problem Tag: 79522
  - 2
    - How to send a simple MIDI-note on a soundcard? I am a newbie in kernel-streaming topics and the drivers... All I need is to play a midi-note in windows kernel-mode. Like MidiOutShortMessage in WinAPI. Where can I read the manuals or examles? Must I use IMiniport interfaces or create complex streams? But how to use this IMiniport interfaces I don't understand completely. All I understand now is to find some PortMidi in system, create a new stream in his Mimiport and to write data. But I don't knpw how to find this Port. I think, there is no need in creating new port. Can you give me code-examples or even ready code? It is easier to understand topics with examples. I must implement this in coming days, it is my home task in university. -- Avtoritet ------------------------------------------------------------------------ Posted via http://www.codecomments.com ------------------------------------------------------------------------ Tag: IoAttachDevice problem Tag: 79517
  - 3
    - How to send USB Set_Idle request to HID driver? I have a USB mouse device that repeatedly sends reports even when nothing has changed. I need to issue a USB Set_Idle request to tell it to only report changes. This mouse uses the built-in HID class driver that's part of Windows. Can this be done from a user-mode app? I looked at al the HidD_Xyz functions, but didn't see anything. If this can only be done from a driver, how would I go about getting a reference to the standard HID class driver associated with this device so I can send it a USB URB? I tried using IoGetDeviceInterfaces( &GUID_DEVINTERFACE_HID ) and calling IoGetDeviceObjectPointer on every device it found, but it failed with every device. Tag: IoAttachDevice problem Tag: 79516
  - 4
    - Why doesn't mirror driver catch BitBlt sometimes? my mirror driver can catch BitBlt call. But I noticed that it's failed to catch BitBlt sometimes immediately after I change the screen resolution. I want the mirror driver be able to capture the whole screen at first by using BitBlt(hdc2,0,0,SCREEN_WIDTH,SCREEN_HEIGHT,hdc1,0,0,SRCCOPY)). I found that BitBlt was executed successfully, But mirror driver didn't capture it. why? BTW, if I right click the task bar and select show the Desktop, the mirror driver may capture the whole screen always. Does anyone help me out? any comment? Tag: IoAttachDevice problem Tag: 79515
  - 5
    - WMI Property Page for Driver I have added WMI support for the driver and I can access the class and the properties using wbemtest and other utlilities. However, there is something that the DDK mentions about having a Property Page and I am not able to see where the propety page comes or how to enable the property page ? I have browed theough the device manager, services menu et al but I cant find it. this is what the DDK says... "Drivers can automatically expose any WMI classes they implement on their property sheet by using the WMI generic property page provider." I have enabled everything through the INF that the DDK says about the property page provider and the co-installer as below, but I still can't find the damn property page..neither in the device manger( by right clicking the device or elsewhere). Any help is appreciated. Thanks. This is from the DDK and I am doing everything as below. Enabling the Generic Property Page Provider To use the WMI generic property page provider with your driver, you must enable wmiprop.dll as a device co-installer. In the CoInstaller add-registry-section, register wmiprop.dll as a co-installer for the WMI class by adding a value entry for the class GUID under the HKLM\System\CurrentControlSet\Control\CoDeviceInstallers key. The value for the value entry is "WmiProp.dll, WmiPropCoInstaller". For example: ; This section is defined in the CoInstaller section, as follows. ; [CoInstaller] ; AddReg = CoInstaller_AddReg [CoInstaller_AddReg] HKLM, System\CurrentControlSet\Control\CoDeviceInstallers, ClassGUID, 0x00010000, "WmiProp.dll, WmiPropCoInstaller" ClassGUID is the GUID for the WMI class. See Registering a Class Co-installer for details. You must also specify the particular WMI classes to be exposed through the generic property provider. To do this, set the WmiConfigClasses value-entry to be a comma-separated list of the WMI classes in the add-registry-section of the device class or device hardware instance. ; the device class AddReg section. [device_class_AddReg] HKR,,"WmiConfigClasses",0x00000000,"class1,class2" ; the device hardware instance AddReg section. [device_hw_inst_AddReg] HKR,,"WmiConfigClasses",0x00000000,"class3" Tag: IoAttachDevice problem Tag: 79511
  - 6
    - Pen Drive Ids As I obtain this information of pen drive? (vendorid, productid...) Use XP SP2 and VB.net 2005 Some idea? Thanks! Tag: IoAttachDevice problem Tag: 79510
  - 7
    - Help with Hidd_GetAttributes The Hidd_GetAttributes function does not return the information to me of my device USB (they pen drive). It returns all 0. GetLastError returns code 50. Use XP SP2 and VB.net 2005 Some idea? Thanks! PS: CreateFile works OK Tag: IoAttachDevice problem Tag: 79502
  - 8
    - Driver project configuration. Hi all, I'm interested in developing Win32 device drivers using the Visual Studio .NET 2003 IDE. (I'm purposely trying to avoid using DDK make files for internal maintenance reasons - trust me, they warrant this action.) Since I'm developing the drivers from scratch I thought I should be able to do this without problems. I've read a few articles about device driver development and have successfully implemented an example driver using the IDE by manually specifying the necessary compiler switches, but I'm not sure how to make certain features work. For example, if I enable C++ exception handling, I receive the following link error: Defs.obj : error LNK2019: unresolved external symbol __CxxThrowException@8 referenced in function "void * __cdecl operator new(unsigned int,enum EMemPool)" (??2@YAPAXIW4EMemPool@@@Z) I discovered that if I manually link in the "libcmt.lib" library then the symbol is resolved, but this is no good because it results in the following link errors (as I expected): kernel32.lib(KERNEL32.dll) : warning LNK4237: /SUBSYSTEM:NATIVE specified when importing from 'KERNEL32.DLL'; Use /SUBSYSTEM:CONSOLE or /SUBSYSTEM:WINDOWS. LINK : warning LNK4078: multiple '.rdata' sections found with different attributes (C0000040) My project is obviously implemented in C++. Now, I know just about every driver developer out there is thinking that one should never use C++ in drivers, but I have yet to discover any compelling reason why, so unless you've got one, please don't respond to this post only to bark at me about how C++ is evil (or whatever.) Please understand that when you respond to the post others that have the answers I need won't because they will assume I have received the information I need. I've overridden the global new and delete operators so I can control whether memory is allocated from the paged or non-paged pool and I've carefully selected my compiler switches to insure that all necessary sections exist and have the proper attributes. At this time it seems that the only problem I have is that I'm missing the VC++ exception handling routines that live the CRT libraries. So I either have to not use exceptions, which is a major loss to me, or find out how to resolve these symbols. Can anyone point me in the right direction? I'm also not sure what I'll be loosing by opting not to use the DDK build system (make files) and using the VS.NET 2003 IDE instead. Is there anything or do the make files primarily just configure build switches, etc? Thanks in advance, Matt Tag: IoAttachDevice problem Tag: 79501
  - 9
    - Mount manager and virtual disk drive Hello, I devloped a virtual disk driver based on the ramdisk sample several years ago. Now we found out, that I can't share the drives on the network or defrag it. Every time I try create a share name I get an error like "device or directory dosen't exist". I guess that IoRegisterDeviceInterface () may solve my problem, but I don't have a PDO... Can swenum supply me a "virtual PDO" ? Is there anywhere a sample for swenum? Regards Kalle Tag: IoAttachDevice problem Tag: 79495
  - 10
    - KSDATARANGE problem (AVSTREAM) Hello. i defined a several struct describing output pin resolution of AVSTREM minidriver like this #define D_X 160 #define D_Y 120 const KS_DATARANGE_VIDEO FormatRGB24Bpp_Capture0 = { // KSDATARANGE { sizeof (KS_DATARANGE_VIDEO), // FormatSize 0, // Flags (Ignored) D_X * D_Y * 3, // SampleSize (Ignored) 0, // Reserved (Reserved) STATICGUIDOF( KSDATAFORMAT_TYPE_VIDEO ), // aka. MEDIATYPE_Video 0xe436eb7d, 0x524f, 0x11ce, 0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70, //MEDIASUBTYPE_RGB24, STATICGUIDOF( KSDATAFORMAT_SPECIFIER_VIDEOINFO ) // aka. FORMAT_VideoInfo }, TRUE, // BOOL, bFixedSizeSamples (all samples same size?) TRUE, // BOOL, bTemporalCompression (all I frames?) KS_VIDEOSTREAM_CAPTURE,// Reserved (was StreamDescriptionFlags) 0, // Reserved (was MemoryAllocationFlags (KS_VIDEO_ALLOC_*)) // _KS_VIDEO_STREAM_CONFIG_CAPS { STATICGUIDOF( KSDATAFORMAT_SPECIFIER_VIDEOINFO ), // GUID KS_AnalogVideo_None, D_X, D_Y, // InputSize, (the inherent size of the incoming signal // with every digitized pixel unique) D_X, D_Y, // MinCroppingSize, smallest rcSrc cropping rect allowed D_X, D_Y, // MaxCroppingSize, largest rcSrc cropping rect allowed 1, // CropGranularityX, granularity of cropping size 1, // CropGranularityY 1, // CropAlignX, alignment of cropping rect 1, // CropAlignY; D_X, D_Y, // MinOutputSize, smallest bitmap stream can produce D_X, D_Y, // MaxOutputSize, largest bitmap stream can produce 1, // OutputGranularityX, granularity of output bitmap size 1, // OutputGranularityY; 0, // StretchTapsX 0, // StretchTapsY 0, // ShrinkTapsX 0, // ShrinkTapsY 333333, // MinFrameInterval, 100 nS units 10000000, // MaxFrameInterval, 100 nS units 8 * 3 * 1 * D_X * D_Y, // MinBitsPerSecond; 8 * 3 * 30 * D_X * D_Y // MaxBitsPerSecond; }, // KS_VIDEOINFOHEADER { 0,0,0,0, // RECT rcSource; 0,0,0,0, // RECT rcTarget; D_X * D_Y * 8 * 3 * 30, // DWORD dwBitRate; 0L, // DWORD dwBitErrorRate; 333333, // REFERENCE_TIME AvgTimePerFrame; // KS_BITMAPINFOHEADER sizeof (KS_BITMAPINFOHEADER), // DWORD biSize; D_X, // LONG biWidth; D_Y, // LONG biHeight; 1, // WORD biPlanes; 24, // WORD biBitCount; KS_BI_RGB, // DWORD biCompression; D_X * D_Y * 3, // DWORD biSizeImage; 0, // LONG biXPelsPerMeter; 0, // LONG biYPelsPerMeter; 0, // DWORD biClrUsed; 0 // DWORD biClrImportant; } }; #undef D_X #undef D_Y And found one problem, when i defined a several resolutions with 160 width (for i.e. 160x120, 160x128, 160x140) AMCAP incorrectly draws resolution list in stream format dialog resolution list - some items is on the incorerect position (i suppose that they should appear in the order as i define it in KSPIN_DESCRIPTOR_EX) and another bug is when i select 160x120 and then opens this dialog again the current selection is 160x140 :( Can anybody advise what the problem is? Thanks. -Tulup Tag: IoAttachDevice problem Tag: 79488
  - 11
    - Which class to use? Hi to all, i am planning to start developing a usb device which has to send continious numbers to the application. I don't want to write a driver. Can i use the drivers already existing. If so which device class can i use for that. Pls shre ur knowledge with so that i can finish my mini project by capturing continious data from usb. Tag: IoAttachDevice problem Tag: 79484
  - 12
    - Error in calling I2COpen function Hi, I've modified WDM sample code ATIShare source code to access the I2C bus. With the code, given below, I am able to get I2COpen & I2CAccess function pointers from Video Adapter. But I2COpen function always returns 0xC00000C2 error code. It is defined in ntstatus.h as #define STATUS_ADAPTER_HARDWARE_ERROR ((NTSTATUS)0xC00000C2L) Has anyone experienced this problem before? There is no documentation available for this. Any help is appreciated. I'm calling LockI2Cprovider function after LocateAttachI2CProvider function call. The program fails in LockI2Cprovider () function. BOOLEAN LocateAttachI2CProvider( PDEVICE_OBJECT pVideoDeviceObject, PI2C_CONTEXT pstI2CContext ) { PIRP pIrp; BOOLEAN bResult = FALSE; PIO_STACK_LOCATION pNextStack; NTSTATUS ntStatus; KEVENT Event; I2CINTERFACE* pI2CInterface; if (pVideoDeviceObject == NULL || pstI2CContext == NULL) { return FALSE; } pI2CInterface = pstI2CContext->m_i2cProviderInterface; if (pI2CInterface == NULL) { return FALSE; } pIrp = IoAllocateIrp (pVideoDeviceObject->StackSize, FALSE); if( pIrp == NULL) { return FALSE; } pNextStack = IoGetNextIrpStackLocation (pIrp); // original if (pNextStack == NULL) { return FALSE; } pIrp->IoStatus.Status = STATUS_NOT_SUPPORTED; pNextStack->MajorFunction = (UCHAR)IRP_MJ_PNP; pNextStack->MinorFunction = IRP_MN_QUERY_INTERFACE; KeInitializeEvent( &Event, NotificationEvent, FALSE); IoSetCompletionRoutine ( pIrp, I2CScriptIoSynchCompletionRoutine, &Event, TRUE, TRUE, TRUE); pNextStack->Parameters.QueryInterface.InterfaceType = (struct _GUID *) &GUID_I2C_INTERFACE; pNextStack->Parameters.QueryInterface.Size = sizeof( I2CINTERFACE); pNextStack->Parameters.QueryInterface.Version = 1; pNextStack->Parameters.QueryInterface.Interface = (PINTERFACE) pI2CInterface; pNextStack->Parameters.QueryInterface.InterfaceSpecificData = NULL; ntStatus = IoCallDriver (pVideoDeviceObject, pIrp); if( ntStatus == STATUS_PENDING) { KeWaitForSingleObject( &Event, Suspended, KernelMode, FALSE, NULL); } if ((pI2CInterface->i2cOpen == NULL) || (pI2CInterface->i2cAccess == NULL)) { return FALSE; } else { DebugPrint ("deviceInfo->m_i2cProviderInterface->i2cOpen 0x%x", pI2CInterface->i2cOpen); DebugPrint ("deviceInfo->m_i2cProviderInterface->i2cAccess 0x%x", pI2CInterface->i2cAccess); } pstI2CContext->m_pdoDriver= pVideoDeviceObject; bResult = TRUE; if( pIrp != NULL) IoFreeIrp( pIrp); return bResult; } BOOLEAN LockI2CProvider (PI2C_CONTEXT pstContext) { NTSTATUS status; if ((pstContext->m_i2cProviderInterface->i2cOpen == NULL) || (pstContext->m_i2cProviderInterface->i2cAccess == NULL) || (pstContext->m_pdoDriver == NULL)) { return FALSE; } pstContext->i2cAccessBlock->Status = I2C_STATUS_NOERROR; status = pstContext->m_i2cProviderInterface->i2cOpen ( pstContext->m_pdoDriver, TRUE, pstContext->i2cAccessBlock); if (status != STATUS_SUCCESS) { DebugPrint ( "CI2CScript: LockI2CProvider() status = 0x%lx\n", status); return FALSE; } pstContext->m_dwI2CAccessKey = pstContext->i2cAccessBlock->dwCookie; DebugPrint ("LockI2CProvider m_dwI2CAccessKey %ld", pstContext->i2cAccessBlock->dwCookie); return TRUE; } Thanks VK Tag: IoAttachDevice problem Tag: 79483
  - 13
    - how to get volume instance for a USB device ? Anyone has any suggestion how the interface ID in the volume class can be acquired based on a known USB drive ? A parameter in USB device registry, "ParantIdIndex", contains the right information, but there is no corresponding SPDRP_xxx for that parameter. Thanks -Gary Tag: IoAttachDevice problem Tag: 79472
  - 14
    - Printing drivers architecture Hi I've read the information in the DDK about the printing architecture and I have several questions: 1. Is there a better documentation about the printing architecture then the MSDN? 2. Why some printers print in raw and some in EMF? How this decision is being taken after an application is issuing a "Print" command? Is there a way to always produce an EMF file instead of RAW, regardless the printer being used? 3. My goal is eventually to get an EMF file from each print request, analyze it and block / deny the printing. So, Where in the "chain" is the best place to enter to do such a thing? Thanks Tag: IoAttachDevice problem Tag: 79463
  - 15
    - Printing drivers architecture Hi I've read the information in the DDK about the printing architecture and I have several questions: 1. Is there a better documentation about the printing architecture then the MSDN? 2. Why some printers print in raw and some in EMF? How this decision is being taken after an application is issuing a "Print" command? Is there a way to always produce an EMF file regardless the printer I'm using? 3. My goal is eventually to get an EMF file from each print request, analyze it and block / deny the printing. So, Where in the "chain" is the best place to enter to do such a thing? Thanks Tag: IoAttachDevice problem Tag: 79462
  - 16
    - USB Selective suspend question again Is there a possibility of race condition when canceling USB idle request? From the WDK docum ( build 5356): "The following list indicates the 3 most important sets of circumstances in which a driver might cancel an idle request and specifies what the driver must do in each case: (1)The bus driver has not called the USB Idle Notification Callback Routine. The driver must use IoCancelIrp to cancel the idle request IRP. (2)The bus driver has called the USB idle notification callback routine. Drivers must not cancel an idle request IRP within the idle notification callback routine. (3) ... If the device is already in a low power state, it is too late to cancel the idle request IRP ... " Since the bus driver calls the callback at passive IRQL, another thread that tries to cancel the idle IRP needs some way to sync with it ? OTOH if the idle IRP can be canceled in parallel with the callback, but the driver needs to serialize something other (like sending D2 power irp), please say exactly so. Regards, Pavel Tag: IoAttachDevice problem Tag: 79459
  - 17
    - Virtual Webcam followup, win98 install issues Hi I've successfully implemented a virtual webcam device driver which plays video files , based on the TESTCAP DDK sample. Its working perfectly on both Win2k/xp and Win98. However, while on 2K/XP , i can install the driver automatically using the sample utility provided in the DDK ( %BASEDIR%\SRC\SETUP\INSTALL ), Im having trouble with doing that on Win98. On Win98 im trying to use the CINSTALL utility. It recognizes the INF file and installs the sys files and device manager shows the entry but when i run AMCAP, I get an error "Could not create video capture filter : 0x80070002" aka File not found. Running a registry monitor shows that its failing to find some registry keys after which it throws the error. Using the Add hardware wizard works seamlessly. Does anyone have a clue as to how to get this to work? At the worst case, if someone could list the entire set of operations that are done when installing a WDM kernel streaming driver, Ill make my installl script perform those actions and get rid of the INF file altogether. The basic structure is identical to TESTCAP, so you can see that one's INF file for details. Thanks in advance Tag: IoAttachDevice problem Tag: 79453
  - 18
    - Serial port number in device manager Hi! I'm working with a driver for virtual serial port and can't make the device manager display the correct port number. It seems to simply increment them, i.e. the first time I create a port it displays e.g. 3, the second time 4 and so on. How can I make the device manager understand which port number is correct? I've set the following: \Device\COMn \DosDevices\COMn (symbolic link) ..\DeviceMap\SERIALCOMM\COMn Thanks in advance, Nille Tag: IoAttachDevice problem Tag: 79452
  - 19
    - Any news on USB autorun (xp)? Hey all, I've been poking all over the net trying to see what the progress is on getting USB drives to autorun/play. The closest thing anyone has come up with is the funky U3 hack of tricking XP with a phony CD drive work-around that leaves you with /two/ extra letters. Interesting work-around, but a hack, never-the-less. This autorun at least gets your program on the popup window, but it's still not autorun. [autorun] action=Launch Portable Start Menu icon=PStart.ico open=PStart.exe label=Monkey Man! includeRuntimeComponents=True Any progress on getting USB drives to autorun/play? Any word from MS? -b Tag: IoAttachDevice problem Tag: 79450
  - 20
    - Help! How to get the DriverObject of PCI Let me clarify the problem I am facing with now. We have a PCIe controller which includes a PCI bridge device and another PCI device. Our driver only controls the PCI device while the PCI bridge device is handled by Windows PCI driver. Now due to a hardware problem, I need to access PCI configuration space of the bridge device. Well, by following the rules of WDM, I wrote a PCI bus filter driver to filter pci.sys. This filter driver sends IRP_MJ_PNP/IRP_MN_QUERY_INTERFACE with InterfaceType GUID_PCI_BUS_INTERFACE_STANDARD to the PCI driver to get the PCI_BUS_INTERFACE_STANDARD. And then our original driver communicates with this filter driver and uses PCI_BUS_INTERFACE_STANDARD.ReadConfig/WriteConfig to enumerate and access any PCI devices on the system. This works fine. However, I am looking for a simpler solution (two driver solution is not convinient for user and I don't know if a PCI bus filter driver is elligible for WHQL or not). First of all, I thought I could use IoGetDeviceObjectPointer to get the DO of PCI driver if it is created with a name, unfortunately it looks like the DO is created without a name. Now I thought if I could get the DriverObject of the PCI driver, then I should be able find the PCI DO by walking through the DriverObject->DeviceObject list. I know this list holds the PCI FDO and PDOs for all enumerated PCI devices, however I can tell which is the FDO I needed by checking DeviceObject->Flags. Well, then now I am looking for a documented (or at least stable among different Windows versions) solution to find the DriverObject of PCI. By playing with WinDbg, it looks like I can find the PCI driver by walking through DeviceObject->DeviceObjectExtension->AttachedTo starts with my own DeviceObject. Unfortunately DeviceObjectExtension->AttachedTo is not a documented field. WinDbg command `!drvobj pci` to get the DriverObject of PCI driver. So does WinDbg command `!object \driver\pci`. I don't know how WinDbg implements these commands. Maybe it checks \driver in the object directory and matches with the name, However, it looks like Windows doesn't publish the DDIs needed to query objects under \driver directory. And also I don't know how to interprete the queried data. The OSR tool DeviceTree now is shipped with Windows DDK. I believe it uses undocument fields or APIs. If MS can accept that as its public tool, Could MS make it published to simplify our developers' life? As you see, I am running out of solution now. Maybe I missed something, maybe I am wrong on something, Could anybody here help me to step out of it? Thanks a lot! Tag: IoAttachDevice problem Tag: 79449
  - 21
    - private data in unidrv Hello! I just want to understand DDK unidrv example. As far as I've read unidrv can include two plug-ins. So,I try OEMDEV structure to send some data from one to another. But when I add some more fields in OEMDEV stucture (I mean besides OEM_DMEXTRAHEADER and dwDriverData, which are happened in DDK example), the data stopped to translate between the plug-ins. Is OEMDEV structure of a fix size, or my private data should be described anywhere more? To fill private members I use the following: LONG APIENTRY OEMDocUICallBack(PCPSUICBPARAM pCallbackParam) { ...... PCBUSERDATA pUserData = (PCBUSERDATA) pCallbackParam->UserData; POEMDEV pOEMDev = (POEMDEV)pUserData->pOEMUIParam->pOEMDM; ........ pOEMDev->dwDriverData1 = 1; pOEMDev->dwDriverData2 = 2; pOEMDev->dwDriverData3 = 3; ....... } Tag: IoAttachDevice problem Tag: 79447
  - 22
    - AddPrinterDriver I want to install printer through programatically For this i have used AddPrinterDriver function. But i am getting an error saying "1804-The specified data type is invalid. ERROR_INVALID_DATATYPE" I have used DRIVER_INFO_3 structure. The problem is comming while calling the AddprinterDriver function. I am adding the piece of this code Dinfo3.cVersion = 3 ; Dinfo3.pEnvironment = "Windows NT x86" ; Dinfo3.pName = "I TEQ" ; Dinfo3.pDriverPath ="c:\\windows\\system32\\spool\\drivers\\w32x86\\3\\UNIDRV.DLL" ; Dinfo3.pDataFile ="c:\\windows\\system32\\spool\\drivers\\w32x86\\3\\ITEQ.GPD" ; Dinfo3.pConfigFile ="c:\\windows\\system32\\spool\\drivers\\w32x86\\3\\UNIDRVUI.DLL ; Dinfo3.pHelpFile = "c:\\windows\\system32\\spool\\drivers\\w32x86\\3\\UNIDRV.HLP" ; Dinfo3.pDependentFiles ="UNIRES.DLL\0ITEQ.DLL\0ITEQ.GPD\0STDNAMES.Gpd\0\0" ; Dinfo3.pMonitorName = NULL ; Dinfo3.pDefaultDataType = "EMF" ; BOOL RetValue = AddPrinterDriver(NULL,3,(LPBYTE)&Dinfo3); Can anybody help me out of this problem. -Shankar B. Tag: IoAttachDevice problem Tag: 79444
  - 23
    - Drivers for Toshiba Satellite Pro 6100 Hi, I have installed win 2k pro on my laptop : toshiba satellite pro 6100. On the device manager, i find conflict on "other devices" section. A yellow question mark is near 1- Base System Device 2- Ethernet Controller 3- Multimedia Audio Controller 4- PCI Device 5- TOSHIBA wireless~_LAN_CARD 6- unknown device i don't have the original CD. i looked in toshiba website and used google but could not find the drivers any help please? many thanks Tag: IoAttachDevice problem Tag: 79437
  - 24
    - NdisQueryBuffer Performance I am working on an NDIS driver and want to look at the Layer 2, IP and TCP headers. I wanted to know how expensive of an operation NdisQueryBuffer is for the buffers that contain the headers. Thanks. Tag: IoAttachDevice problem Tag: 79435
  - 25
    - Why no DEV_BROADCAST_HDR in WM_DEVICECHANGE ? I am trying to catch up a USB driver insertion/removal with WM_DEVICECHANGE. I called RegisterDeviceNotification() with GUID_DEVINTERFACE_DISK or GUID_DEVINTERFACE_VOLUME, but in WM_DEVICECHANGE message, I can see only DBT_DEVNODES_CHANGED. The parameters like wParam = DBT_DEVICEARRIVAL, and/or lParam= DEV_BROACAST_HDR are never seen. Any suggestion ? My data structure when calling RegisterDeviceNotification() looks like: ZeroMemory(pNotificationFilter, nSize); pNotificationFilter->dbcc_size = nSize; pNotificationFilter->dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE; pNotificationFilter->dbcc_classguid = InterfaceClassGuid; memcpy(pNotificationFilter->dbcc_name,deviceName,sizeof(deviceName)); *hDevNotify = RegisterDeviceNotification(hWnd,pNotificationFilter,DEVICE_NOTIFY_WINDOW_HANDLE); Thanks -Gary Tag: IoAttachDevice problem Tag: 79434

Hi,

Recently I went thru' a source code that uses IoAttachDevice function
to get the target device object.

status = IoAttachDevice (DeviceObject, TargetDeviceName,
&pDevExt->AttachedDeviceObject); // TargetDeviceName is set to
\\Device\\Video0

pDevExt->TargetDeviceObject = pDevExt->AttachedDeviceObject;

IoDetachDevice (pDevExt->AttachedDeviceObject);
IoCallDriver (pDevExt->TargetDeviceObject, ....)

But is this the right way to do that?

2. Moreover, what's the difference between

pDevExt->AttachedDeviceObject and
pDevExt->AttachedDeviceObject->DriverObject->DeviceObject in this
context?

Could someone please explain me?

Thanks
VK

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Re: IoAttachDevice problem by Maxim

Maxim
Thu May 18 09:06:50 CDT 2006

> Recently I went thru' a source code that uses IoAttachDevice function
> to get the target device object.
>
> status = IoAttachDevice (DeviceObject, TargetDeviceName,

IoAttachDevice is obsolete, use IoAttachDeviceToDeviceStackSafe instead.

--
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
maxim@storagecraft.com
http://www.storagecraft.com

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