Problem with SetupDiGetDriverInfoDetail API

Question

Hi Guys,

I'm having trouble with an API call to SetupDiGetDriverInfoDetail.  It creates a PInvoke stack imbalance.  I'm sure I messed up something in the import or the structure but I can't see it.

Here's the code:

Friend Sub New(ByVal ptrInfoSet As IntPtr, ByVal diiIstanceInfo As DeviceInstanceInfo, ByVal ddiDriverInfo As DeviceDriverInfo)
		Dim ptrQueue As IntPtr = NativeMethods.SetupOpenFileQueue()
		Dim dipInstallParameters As New DeviceInstallParameters()
		Dim didDriverInfoDetailData As New DeviceDriverInfoDetailData
		Dim ddfFileCallBack As DeviceDriverFileCallBack = AddressOf OnDriverFile
		Dim intResult As Integer
		strManufacturer = ddiDriverInfo.Manufacturer
		strProvider = ddiDriverInfo.Provider
		strDescription = ddiDriverInfo.Description
		dteReleaseDate = DateTime.FromFileTime(ddiDriverInfo.ReleaseDate)
		verVersion = New Version(CInt(((ddiDriverInfo.Version >> 48) And &HFFFF)), CInt(((ddiDriverInfo.Version >> 32) And &HFFFF)), CInt(((ddiDriverInfo.Version >> 16) And &HFFFF)), CInt(((ddiDriverInfo.Version >> 0) And &HFFFF)))
		lstFiles = New List(Of String)()
		If ptrQueue <> New IntPtr(-1) Then
			dipInstallParameters.Size = Marshal.SizeOf(GetType(DeviceInstallParameters))
			If NativeMethods.SetupDiGetDeviceInstallParamsW(ptrInfoSet, diiIstanceInfo, dipInstallParameters) Then
				dipInstallParameters.Flags = dipInstallParameters.Flags Or DeviceInstallFlags.NOVCP
				dipInstallParameters.hFileQueue = ptrQueue
				If NativeMethods.SetupDiSetDeviceInstallParamsW(ptrInfoSet, diiIstanceInfo, dipInstallParameters) Then
					If NativeMethods.SetupDiSetSelectedDriverW(ptrInfoSet, diiIstanceInfo, ddiDriverInfo) Then
						If NativeMethods.SetupDiCallClassInstaller(DeviceDriverInstallFunction.InstallDeviceFiles, ptrInfoSet, diiIstanceInfo) Then
							NativeMethods.SetupScanFileQueueW(ptrQueue, DeviceDriverFileQueueFlags.UseCallback, IntPtr.Zero, ddfFileCallBack, IntPtr.Zero, intResult)
							GC.KeepAlive(ddfFileCallBack)
						End If
					End If
				End If
			End If
			NativeMethods.SetupCloseFileQueue(ptrQueue)
		End If
		didDriverInfoDetailData.Size = Marshal.SizeOf(GetType(DeviceDriverInfoDetailData))
		If NativeMethods.SetupDiGetDriverInfoDetail(ptrInfoSet, ddiDriverInfo, ddiDriverInfo, didDriverInfoDetailData, didDriverInfoDetailData.Size, didDriverInfoDetailData.Size) Then
			MsgBox(didDriverInfoDetailData.InfFileName)
		End If
	End Sub

It fails on the call to setupdigetdriverinfodetail.

Here's the import:

	<DllImport("setupapi.dll", CharSet:=CharSet.Auto, SetLastError:=True)> _
	<ReliabilityContract(Consistency.WillNotCorruptState, Cer.None)> _
	Public Function SetupDiGetDriverInfoDetail(<[In]()> ByVal hDeviceInfoSet As IntPtr, <[In]()> ByVal DeviceInfoData As DeviceDriverInfo, <[In]()> ByVal DriverInfoData As DeviceDriverInfo, <Out()> ByRef DriverInfoDetailData As DeviceDriverInfoDetailData, <[In]()> ByVal DriverInfoDetailDataSize As Int32, <Out()> ByRef RequiredSize As Int32) As Boolean
	End Function

Here's my structures:

Public Structure DeviceDriverInfo
	Public Size As Integer
	<MarshalAs(UnmanagedType.U4)> _
	Public DriverType As DeviceDriverType
	Public Reserved As IntPtr
	<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=256)> _
	Public Description As String
	<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=256)> _
	Public Manufacturer As String
	<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=256)> _
	Public Provider As String
	Public ReleaseDate As Long
	Public Version As Long
End Structure
<StructLayout(LayoutKind.Sequential, Pack:=4, CharSet:=CharSet.Unicode)> _
Public Structure DeviceDriverInfoDetailData
	Public Size As Int32
	Public InfDate As System.Runtime.InteropServices.ComTypes.FILETIME
	Public CompatIDsOffset As Int32
	Public CompatIDsLength As Int32
	Public Reserved As IntPtr
	<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=256)> _
	Public SectionName As [String]
	<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=260)> _
 Public InfFileName As [String]
	<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=256)> _
	Public DrvDescription As [String]
	<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=1)> _
 Public HardwareID As [String]
End Structure

I'm sure I just got things crossed up somewhere, but I've been staring at it for the last hour and can't see straight.  Need a fresh set of eyes.

Thanks

Answer 1

Call SetupDiGetDriverInfoDetail to get the RequiredSize of the DriverInfoDetailData structure.  Does the size match the size you supply?

Answer 2

Here's my code:

		didDriverInfoDetailData.Size = Marshal.SizeOf(GetType(DeviceDriverInfoDetailData))
		If NativeMethods.SetupDiGetDriverInfoDetail(ptrInfoSet, diiIstanceInfo, diiIstanceInfo, diiIstanceInfo, didDriverInfoDetailData.Size, didDriverInfoDetailData.Size) Then
			MsgBox(didDriverInfoDetailData.InfFileName)
		End If

No message box is displayed so the call fails with an error. Haven't checked the error code.  I think there's still something wrong with my structure

Answer 3

Change your code to determine the RequiredSize of the structure.  If you want to add a message box, that's fine, but you can check it with intellisense also.  You need to study the documentation to learn how to use the method.  You make a call to determine the required size, allocate the structure and make a second call.

Answer 4

I'm not sure I understand what you're saying..  I thought didDriverInfoDetailData.Size = Marshal.SizeOf(GetType(DeviceDriverInfoDetailData)) sets the size of the structure.  I have studied what documentation I am able to find which isn't much.  I haven't been able to locate any sample code when demonstrates calling the API only documentation showing the proper structure of the typedef and function parameters.  If you can direct me to a sample code stub which shows how to properly call the function I would appreciate it.

Answer 5

You should be able to find complete documentation using the help menu of your IDE.  Paste "SetupDiGetDriverInfoDetail" in the search box of the Index pane.  If you're using VS2008 or earlier and you haven't downloaded the MSDN library, you'll have to use the online help.  There is no reason for doing anything else until you get a valid value for the required size of the structure.  Working with the setupapi is complex.  You really should have some idea of what you are doing to use it.

Answer 6

Issues with unmanaged API calls would probably be better addressed in the Interop and Upgrade forum.  I'll move this thread there since you suspect the issue is with the COM Interop portion of your code.

One thing I do notice is the use of Int32 instead of IntPtr - could be causing an issue if you are compiling on a 64bit machine with Any-CPU or 64Bit profiles....

---

Reed Kimble - "When you do things right, people won't be sure you've done anything at all"

Answer 7

I do have experience using Win32 API. Just never used this one before.  I am VERY aware that it's complex and even tricky sometimes.  Thanks for being so sarcastic I appreciate it.

Answer 8

Thanks Reed for the help and for not being sarcastic in your reply.  I understand what you're saying about where it really should be posted. I've posted other similar stuff there and got no replies at all.  I do understand how to use API, I'm just struggling with the differences in .Net, it's confusing and I haven't been able to find a reference which covers Win32 API in the .Net world.  I have a reference by Dan Appleman but it's not much help.

Answer 9

I do have experience using Win32 API. Just never used this one before.  I am VERY aware that it's complex and even tricky sometimes.  Thanks for being so sarcastic I appreciate it.

The note in the documentation states: 
Note  DriverInfoDetailData.cbSize must not be set to the value of the DriverInfoDetailDataSize parameter

Answer 10

Hi Guys,

I'm still struggling with this API call.  I did find a similar API and I've tried to use it as a guide for what I need to do here.  I think I'm close, but I can't quite get it.  Hope someone can help me out here.  Here's my code:

	Friend Sub New(ByVal ptrInfoSet As IntPtr, ByVal diiIstanceInfo As DeviceInstanceInfo, ByVal ddiDriverInfo As DeviceDriverInfo)
		Dim ptrQueue As IntPtr = NativeMethods.SetupOpenFileQueue()
		Dim dipInstallParameters As New DeviceInstallParameters()
		Dim didDummy As DeviceDriverInfoDetailData = Nothing
		Dim didDriverInfoDetailData As New DeviceDriverInfoDetailData
		Dim ddfFileCallBack As DeviceDriverFileCallBack = AddressOf OnDriverFile
		Dim intResult As Integer
		Dim intReturnLength As Integer
		Dim blnResult As Boolean = NativeMethods.SetupDiGetDriverInfoDetail(ptrInfoSet, diiIstanceInfo, diiIstanceInfo, didDummy, didDummy.Size, intReturnLength)
		Dim intError As Integer
		Dim intBaseSize As Integer = Marshal.SizeOf(GetType(DeviceDriverInfoDetailData))
		Dim intNumberOfElements As Integer = intReturnLength \ intBaseSize
		Dim intAllocatedSize As Integer = (intNumberOfElements * intBaseSize)
		strManufacturer = ddiDriverInfo.Manufacturer
		strProvider = ddiDriverInfo.Provider
		strDescription = ddiDriverInfo.Description
		strDriverPath = dipInstallParameters.DriverPath
		dteReleaseDate = DateTime.FromFileTime(ddiDriverInfo.ReleaseDate)
		verVersion = New Version(CInt(((ddiDriverInfo.Version >> 48) And &HFFFF)), CInt(((ddiDriverInfo.Version >> 32) And &HFFFF)), CInt(((ddiDriverInfo.Version >> 16) And &HFFFF)), CInt(((ddiDriverInfo.Version >> 0) And &HFFFF)))
		lstFiles = New List(Of String)()
		If ptrQueue <> New IntPtr(-1) Then
			dipInstallParameters.Size = Marshal.SizeOf(GetType(DeviceInstallParameters))
			If NativeMethods.SetupDiGetDeviceInstallParamsW(ptrInfoSet, diiIstanceInfo, dipInstallParameters) Then
				dipInstallParameters.Flags = dipInstallParameters.Flags Or DeviceInstallFlags.NOVCP
				dipInstallParameters.hFileQueue = ptrQueue
				If NativeMethods.SetupDiSetDeviceInstallParamsW(ptrInfoSet, diiIstanceInfo, dipInstallParameters) Then
					If NativeMethods.SetupDiSetSelectedDriverW(ptrInfoSet, diiIstanceInfo, ddiDriverInfo) Then
						If NativeMethods.SetupDiCallClassInstaller(DeviceDriverInstallFunction.InstallDeviceFiles, ptrInfoSet, diiIstanceInfo) Then
							NativeMethods.SetupScanFileQueueW(ptrQueue, DeviceDriverFileQueueFlags.UseCallback, IntPtr.Zero, ddfFileCallBack, IntPtr.Zero, intResult)
							GC.KeepAlive(ddfFileCallBack)
						End If
					End If
				End If
			End If
			NativeMethods.SetupCloseFileQueue(ptrQueue)
		End If
		'intBaseSize = Marshal.SizeOf(GetType(DeviceDriverInfoDetailData))
		'If NativeMethods.SetupDiGetDriverInfoDetail(ptrInfoSet, diiIstanceInfo, diiIstanceInfo, didDummy, didDummy.Size, intReturnLength) Then
		'Throw Fail("SetupDiGetDriverInfoDetail Failed.")
		'End If
		'blnResult = NativeMethods.SetupDiGetDriverInfoDetail(ptrInfoSet, diiIstanceInfo, diiIstanceInfo, didDummy, didDummy.Size, intReturnLength)
		'intNumberOfElements = intReturnLength \ intBaseSize
		'intAllocatedSize = (intNumberOfElements * intBaseSize)
		If blnResult Then
			Throw Fail("SetupDiGetDriverInfoDetail Failed.")
		End If
		'intError = Marshal.GetLastWin32Error()
		If Marshal.GetLastWin32Error() <> ERROR_INSUFFICIENT_BUFFER Then
			Throw Fail("Insufficient Space In The Buffer.", Marshal.GetLastWin32Error().ToString())
		End If
		intBaseSize = Marshal.SizeOf(GetType(DeviceDriverInfoDetailData))
		intNumberOfElements = intReturnLength \ intBaseSize
		intAllocatedSize = (intNumberOfElements * intBaseSize)
		If Not NativeMethods.SetupDiGetDriverInfoDetail(ptrInfoSet, diiIstanceInfo, diiIstanceInfo, didDriverInfoDetailData, intBaseSize, intAllocatedSize) Then
			Throw Fail("SetupDiGetDriverInfoDetail Failed", Marshal.GetLastWin32Error().ToString())
		Else
			strINFName = didDriverInfoDetailData.InfFileName
			strSectionName = didDriverInfoDetailData.SectionName
			dteINFDate = DateTime.FromFileTime(didDriverInfoDetailData.InfDate.dwHighDateTime)
		End If
	End Sub

Here's my Import:

<DllImport("setupapi.dll", CharSet:=CharSet.Auto, SetLastError:=True)> _
	<ReliabilityContract(Consistency.WillNotCorruptState, Cer.None)> _
	Public Function SetupDiGetDriverInfoDetail(<[In]()> ByVal hDeviceInfoSet As IntPtr, <[In]()> ByRef DeviceInfoData As DeviceInstanceInfo, <[In]()> ByRef DriverInfoData As DeviceInstanceInfo, <[In](), Out()> ByRef DriverInfoDetailDatail As DeviceDriverInfoDetailData, ByVal DriverInfoDetailDataSize As Int32, ByRef RequiredSize As Int32) As Boolean
	End Function

Here's my structure:

<StructLayout(LayoutKind.Sequential, Pack:=4, CharSet:=CharSet.Unicode)> _
Public Structure DeviceDriverInfoDetailData
	Public Size As Int32
	Public InfDate As System.Runtime.InteropServices.ComTypes.FILETIME
	Public CompatIDsOffset As Int32
	Public CompatIDsLength As Int32
	Public Reserved As IntPtr
	<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=256)> _
	Public SectionName As String
	<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=260)> _
	Public InfFileName As String
	<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=256)> _
	Public DrvDescription As String
	<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=1)> _
	Public HardwareID As String
End Structure

<StructLayout(LayoutKind.Sequential, Pack:=4)> _
Public Structure DeviceInstanceInfo
	Public Size As Integer
	Public ClassGuid As Guid
	Public InstanceID As Integer
	Public Reserved As IntPtr
End Structure

I understand how the function call is supposed to work.  It has to be called twice.  The first call should return the required size of the buffer needed to hold the information.  That value is used in the second call to actually return the data.  All my attempts so far do not return the required size.  It always comes back 0

Answer 11

Ok, let's continue here as declared in your other thread.

My current task is handling the hardware IDs, which is the last member of DeviceDriverInfoDetailData. (Yes, I can handle it.) Though, reading the documentation of SetupDiGetDriverInfoDetail there are some things to consider. The whole structure must be marshalled in two steps because of the dynamic length. I managed to copy the hardware IDs to a String. It's also not a problem to split the string, but the CompatIDsOffset must also be taken into account, so I want to handle it directly when working with the marshaller, not later because the character set has to be considered also.

Anyway, just wanted to say I'm still at it (close to finish), but it's 4:19 AM here now, so I'll continue tomorrow.

---

Armin

Answer 12

Wow nice to know I'm not the only one who stays up til insane hours.   I'm just working on the output of device/device driver properties.  Still trying to figure some of them out but I am making progress.  Get some sleep my friend, I'm not far behind you.  I think I've had enough fun for one day and I'm pretty happy with the progress I've made.  Good night

Answer 13

Output works:

#76
    Description = Windows RAM-Laufwerkcontroller
    DriverDate = 21.06.2006 02:00:00
    DriverType = ClassDriver
    DriverVersion = 1688854653321217
    ManufacturerName = Microsoft
    ProviderName = Microsoft
    Details:
        DriverDescription = Windows RAM-Laufwerkcontroller
        InfDate = 13.07.2009 22:39:18
        InfFileName = C:\Windows\INF\ramdisk.inf
        SectionName = BusInstall
        HardwareID = ramdisk
        CompatibleIDs:
            detectedinternal\ramdisk
            detected\ramdisk

I'll have to put everything together tomorrow.

Good night - the last time for today. ;)

---

Armin

Answer 14

New day... :)

As I said in the other thread, I'm using a managed wrapper for all this, so I can't post the code creating the output. However here's the unmanaged helper function for calling SetupDiGetDriverInfoDetail and "post processing":

   Public Shared Function GetDriverInfoDetail( _
      ByVal DeviceInfoSet As IntPtr, _
      ByVal DriverInfoData As SP_DRVINFO_DATA) _
      As ExtendedDriverInfoDetail

      Dim RequiredSize As UInt32

      Functions.SetupDiGetDriverInfoDetail(DeviceInfoSet, IntPtr.Zero, DriverInfoData, IntPtr.Zero, 0, RequiredSize) 'always returns False

      If Win32.Helper.GetLastWin32Error = Win32.Errors.InsufficientBuffer Then
         Dim ptr = Marshal.AllocHGlobal(CInt(RequiredSize))

         Try
            Dim type = GetType(SP_DRVINFO_DETAIL_DATA)

            Marshal.WriteInt32(ptr, Marshal.SizeOf(type))

            If Functions.SetupDiGetDriverInfoDetail(DeviceInfoSet, IntPtr.Zero, DriverInfoData, ptr, RequiredSize, IntPtr.Zero) Then
               Dim result As SP_DRVINFO_DETAIL_DATA
               Dim OffsetHardwareID = Marshal.OffsetOf(type, "HardwareID")
               Dim ptrHardwareID As IntPtr = ptr.Add(OffsetHardwareID)
               Dim HardwareIDLength = CInt(RequiredSize) - OffsetHardwareID.ToInt32
               Dim HardwareID As String = Nothing
               Dim CompatibleIDsList As List(Of String) = Nothing

               result = DirectCast(Marshal.PtrToStructure(ptr, type), SP_DRVINFO_DETAIL_DATA)
               result.HardwareID = Marshal.PtrToStringAuto(ptrHardwareID, HardwareIDLength)

               If result.CompatIDsOffset > 1 Then
                  HardwareID = Marshal.PtrToStringAuto(ptrHardwareID)
               End If

               If result.CompatIDsLength > 0 Then
                  Dim ptrCompatibleIDs = ptrHardwareID.Add(CInt(result.CompatIDsOffset) * Marshal.SystemDefaultCharSize)
                  Dim CompatibleIDs = Marshal.PtrToStringAuto(ptrCompatibleIDs, CInt(result.CompatIDsLength))

                  CompatibleIDsList = New List(Of String)(CompatibleIDs.Split(Convert.ToChar(0US)))
                  CompatibleIDsList.RemoveAt(CompatibleIDsList.Count - 1)
                  CompatibleIDsList.RemoveAt(CompatibleIDsList.Count - 1)
               End If

               Return New ExtendedDriverInfoDetail(result, HardwareID, CompatibleIDsList)
            Else
               Win32.Helper.ThrowWin32Exception("SetupDiGetDriverInfoDetail")
            End If
         Finally
            Marshal.FreeHGlobal(ptr)
         End Try
      Else
         Win32.Helper.ThrowWin32Exception("SetupDiGetDriverInfoDetail")
      End If

   End Function

I'll piece together all missing declarations from my libraries and post them.

Oh, and the above is only the version for retrieving the data for the whole DeviceInfoSet, not for a specific device. I'll still have to write the latter one.

---

Armin

Answer 15

Missing declarations:

<StructLayout(LayoutKind.Sequential, Pack:=0, CharSet:=CharSet.Auto)> _
Public Structure SP_DRVINFO_DATA
   Public Size As UInt32
   Public DriverType As DriverType
   Public Reserved As UIntPtr
   <MarshalAs(UnmanagedType.ByValTStr, sizeconst:=AZ.Win32.Constants.LINE_LEN)> Public Description As String
   <MarshalAs(UnmanagedType.ByValTStr, sizeconst:=AZ.Win32.Constants.LINE_LEN)> Public MfgName As String
   <MarshalAs(UnmanagedType.ByValTStr, sizeconst:=AZ.Win32.Constants.LINE_LEN)> Public ProviderName As String
   Public DriverDate As AZ.Win32.FILETIME 'ComTypes.FILETIME 
   Public DriverVersion As UInt64
End Structure


Public Enum DriverType As UInt32
   NoDriver = 0
   ClassDriver = 1
   CompatDriver = 2
End Enum

Public Const LINE_LEN As Integer = 256

''' <summary>
''' </summary>
''' <remarks>Attention: According to the documentation,
''' pointers to a FILETIME structure must
''' not be casted to __in64* or ULARGE_INTEGER*
''' due to alignment problems on 64 bit Windows.</remarks>
<StructLayout(LayoutKind.Sequential)> _
Public Structure FILETIME
   Public LowDateTime As UInteger
   Public HighDateTime As UInteger
End Structure


Public Class ExtendedDriverInfoDetail
   Public ReadOnly Native As SP_DRVINFO_DETAIL_DATA
   Public ReadOnly HardwareID As String

   Private ReadOnly _CompatibleIDs As System.Collections.ObjectModel.ReadOnlyCollection(Of String)

   Friend Sub New( _
      ByVal Native As SP_DRVINFO_DETAIL_DATA, _
      ByVal HardwareID As String, _
      ByVal CompatibleIDs As Collections.Generic.List(Of String))

      Me.Native = Native
      Me.HardwareID = HardwareID

      If CompatibleIDs IsNot Nothing Then
         _CompatibleIDs = CompatibleIDs.AsReadOnly
      End If

   End Sub
   Public ReadOnly Property CompatibleIDs() As System.Collections.ObjectModel.ReadOnlyCollection(Of String)
      Get
         Return _CompatibleIDs
      End Get
   End Property

End Class


<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Auto)> _
Public Structure SP_DRVINFO_DETAIL_DATA
   Public cbSize As UInt32
   Public InfDate As AZ.Win32.FILETIME
   Public CompatIDsOffset As UInt32
   Public CompatIDsLength As UInt32
   Public Reserved As UIntPtr
   <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=AZ.Win32.Constants.LINE_LEN)> Public SectionName As String
   <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=AZ.Win32.Constants.MAX_PATH)> Public InfFileName As String
   <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=AZ.Win32.Constants.LINE_LEN)> Public DrvDescription As String
   <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=AZ.Win32.Constants.ANYSIZE_ARRAY)> Public HardwareID As String
End Structure


Public Const MAX_PATH As UInteger = 260
Public Const ANYSIZE_ARRAY As UInteger = 1


   Public Declare Auto Function SetupDiGetDriverInfoDetail Lib "setupapi.dll" ( _
      ByVal hDeviceInfoSet As IntPtr, _
      ByVal DeviceInfoData As IntPtr, _
      <[In]()> ByRef DriverInfoData As SP_DRVINFO_DATA, _
      ByVal DriverInfoDetailData As IntPtr, _
      ByVal DriverInfoDetailDataSize As Int32, _
      ByRef RequiredSize As UInt32) As Boolean



   Public Declare Auto Function SetupDiGetDriverInfoDetail Lib "setupapi.dll" ( _
      ByVal hDeviceInfoSet As IntPtr, _
      ByVal DeviceInfoData As IntPtr, _
      <[In]()> ByRef DriverInfoData As SP_DRVINFO_DATA, _
      ByVal DriverInfoDetailData As IntPtr, _
      ByVal DriverInfoDetailDataSize As UInt32, _
      ByVal RequiredSize As IntPtr) As Boolean

Just pick out what you not already have, and also let me know if something's missing.

---

Armin

Answer 16

Addition: As reasoned in one of my last posts from yesterday, I decided to add that helper class "ExtendedDriverInfoDetail". Otherwise the native structure really wouldn't be convenient to handle.

---

Armin

Answer 17

Hello Armin,

Thanks for the assist.  I just woke up, yawn.  I couldn't fall alseep at all.  I can't see your actual code that calls the function very well.  Some of it scrolls out of the window and does not wrap. Could you repost the code please.

Answer 18

Hi and good morning, :)

there should be a scollbar. Use another browser. ;) Chrome works well. If I post again, it would look the same.

The calling code is nothing special; just pass the deviceinfoset handle and the SP_DRVINFO_DATA structure. The latter you get from a call to SetupDiEnumDriverInfo.

Currently I'm busy and have to push my own project. I think the kind guys here in the forum will continue.

---

Armin

Answer 19

OK Armin,

Thanks, I understand.  I have to put my project on hold to deal with some family issues anyway.  I appreciate your help.