How to enumerate audio devices in Windows 7?

Hi!
My Labview application works now in WinXP environment.
It uses audio device enumeration to select the appropriate device on PC.
To do it I use now Automation call to DirectX interface.
This function generates error on PC under Windows7 with message: "unregistered class....".
Of course Win7 doesn't have DX8,
What an alternative does exists in Win7 and what I have to change in my Labview function?
Thanks in advance for an idea.
Anatoly
Solved!
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/Re: "No audio device" in Windows 7 !? If you haven't give this a try,
http://forums.creative.com/t5/Sound-Blaster/SB-P7X-Series-Support-Pack-2-0-07-3-2009-AudigySE-Value-LS/td-p/53329
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Model Identifier: MacBookPro5,2
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Message was edited by: msb767676

I have the same problem, but when i run from the CD, I get the 2762 error, and from the download, it works fine but fixes nothing.

Figuring out how to access a device using Windows.Devices.HumanInterfaceDevice?

Before I start, I would like to share this link I used to access windows RT libraries from Desktop applications (only the ones stated in MSDN documentation that are accessible from desktop applications):
http://blogs.msdn.com/b/cdndevs/archive/2013/10/02/using-windows-8-winrt-apis-in-net-desktop-applications.aspx .
After following the above instructions you can import some of the windows RT libraries in references. I have been trying to use the Windows.Devices.HumanInterfaceDevice library. I think my UsagePage and UsageId are off though. I am wondering
if someone good in hex can translate them from my report descriptor. I already have the VID and PID (this should be enough along with the path if I called write file or some of the other win32/OS api's). Here's the code I am using in VB.NET:
Public Class VirtualMouseDeviceOpen
Class Enumeration
' Enumerate HID devices
Public Async Function EnumerateHidDevices() As Task
Dim vendorId As UInt32 = &HBEEF
Dim productId As UInt32 = &HFEED
Dim usagePage As UInt32 = &HFF
Dim usageId As UInt32 = &H1
' Create a selector that gets a HID device using VID/PID and a
' VendorDefined usage
Dim selector As String = HidDevice.GetDeviceSelector(usagePage, usageId, vendorId, productId)
' Enumerate devices using the selector
Dim devices As Windows.Foundation.IAsyncOperation(Of Windows.Devices.Enumeration.DeviceInformationCollection) = DeviceInformation.FindAllAsync(selector)
Dim count As Integer = devices.GetResults.Count
If count > 0 Then
' Open the target HID device
' At this point the device is available to communicate with
' So we can send/receive HID reports from it or
' query it for control descriptions
Dim device As HidDevice = HidDevice.FromIdAsync(devices.GetResults.ElementAt(0).Id, FileAccessMode.ReadWrite)
Await Vendor.ReadWriteToHidDevice(device)
Else
' There were no HID devices that met the selector criteria
MsgBox("MUTT HID device not found!", MsgBoxStyle.Exclamation)
End If
End Function
Class Vendor
Public Shared Async Function ReadWriteToHidDevice(device As HidDevice) As Task
If device IsNot Nothing Then
' construct a HID output report to send to the device
Dim outReport As HidOutputReport = device.CreateOutputReport()
' Initialize the data buffer and fill it in
Dim buffer As Byte() = New Byte() {10, 20, 30, 40}
Dim dataWriter As New DataWriter()
dataWriter.WriteBytes(buffer)
outReport.Data = dataWriter.DetachBuffer()
' Send the output report asynchronously
Dim a As Windows.Foundation.IAsyncOperation(Of UInteger) = device.SendOutputReportAsync(outReport)
' Sent output report successfully
' Now lets try read an input report
Dim inReport As HidInputReport = device.GetInputReportAsync()
If inReport IsNot Nothing Then
Dim id As UInt16 = inReport.Id
Dim bytes = New Byte(3) {}
Dim dataReader__1 As DataReader = DataReader.FromBuffer(inReport.Data)
dataReader__1.ReadBytes(bytes)
Else
MsgBox("Invalid input report received")
End If
Else
MsgBox("device is NULL")
End If
End Function
End Class
End Class
Here's my report descriptor to avoid scrimmaging through everything trying to find it:
HID_REPORT_DESCRIPTOR G_DefaultReportDescriptor[] = {
0x06,0x00, 0xFF, // USAGE_PAGE (Vender Defined Usage Page)
0x09,0x01, // USAGE (Vendor Usage 0x01)
0xA1,0x01, // COLLECTION (Application)
0x85,CONTROL_FEATURE_REPORT_ID, // REPORT_ID (1)
0x09,0x01, // USAGE (Vendor Usage 0x01)
0x15,0x00, // LOGICAL_MINIMUM(0)
0x26,0xff, 0x00, // LOGICAL_MAXIMUM(255)
0x75,0x08, // REPORT_SIZE (0x08)
//0x95,FEATURE_REPORT_SIZE_CB, // REPORT_COUNT
0x96,(FEATURE_REPORT_SIZE_CB & 0xff), (FEATURE_REPORT_SIZE_CB >> 8), // REPORT_COUNT
0xB1,0x00, // FEATURE (Data,Ary,Abs)
0x09,0x01, // USAGE (Vendor Usage 0x01)
0x75,0x08, // REPORT_SIZE (0x08)
//0x95,INPUT_REPORT_SIZE_CB, // REPORT_COUNT
0x96,(INPUT_REPORT_SIZE_CB & 0xff), (INPUT_REPORT_SIZE_CB >> 8), // REPORT_COUNT
0x81,0x00, // INPUT (Data,Ary,Abs)
0x09,0x01, // USAGE (Vendor Usage 0x01)
0x75,0x08, // REPORT_SIZE (0x08)
//0x95,OUTPUT_REPORT_SIZE_CB, // REPORT_COUNT
0x96,(OUTPUT_REPORT_SIZE_CB & 0xff), (OUTPUT_REPORT_SIZE_CB >> 8), // REPORT_COUNT
0x91,0x00, // OUTPUT (Data,Ary,Abs)
0xC0, // END_COLLECTION
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x09, 0x02, // USAGE (Mouse)
0xa1, 0x01, // COLLECTION (Application)
0x85, 0x02, // REPORT_ID (2)
0x09, 0x01, // USAGE (Pointer)
0xa1, 0x00, // COLLECTION (Physical)
0x05, 0x09, // USAGE_PAGE (Button)
0x19, 0x01, // USAGE_MINIMUM (Button 1)
0x29, 0x03, // USAGE_MAXIMUM (Button 3)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x25, 0x01, // LOGICAL_MAXIMUM (1)
0x95, 0x03, // REPORT_COUNT (3)
0x75, 0x01, // REPORT_SIZE (1)
0x81, 0x02, // INPUT (Data,Var,Abs)
0x95, 0x01, // REPORT_COUNT (1)
0x75, 0x05, // REPORT_SIZE (5)
0x81, 0x03, // INPUT (Cnst,Var,Abs)
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x09, 0x30, // USAGE (X)
0x09, 0x31, // USAGE (Y)
0x15, 0x81, // LOGICAL_MINIMUM (-127)
0x25, 0x7f, // LOGICAL_MAXIMUM (127)
0x75, 0x08, // REPORT_SIZE (8)
0x95, 0x02, // REPORT_COUNT (2)
0x81, 0x06, // INPUT (Data,Var,Rel)
0xc0, // END_COLLECTION
0xc0 // END_COLLECTION
My UsageId is the first Usage Hex value in the report descriptor I believe (I am still a little confused too). My UsagePage is the hex values in the first Usage_Page in the report descriptor.
Note: the problem with the VB.NET code is that it returns 0 on the count above which means it did not find a device using my criteria.
Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth. - Sherlock Holmes. speak softly and carry a big stick - theodore roosevelt. Fear leads to anger, anger leads to hate, hate leads to suffering - Yoda. Blog -
http://www.computerprofessions.us

Before I start, I would like to share this link I used to access windows RT libraries from Desktop applications (only the ones stated in MSDN documentation that are accessible from desktop applications):
http://blogs.msdn.com/b/cdndevs/archive/2013/10/02/using-windows-8-winrt-apis-in-net-desktop-applications.aspx .
After following the above instructions you can import some of the windows RT libraries in references. I have been trying to use the Windows.Devices.HumanInterfaceDevice library. I think my UsagePage and UsageId are off though. I am wondering
if someone good in hex can translate them from my report descriptor. I already have the VID and PID (this should be enough along with the path if I called write file or some of the other win32/OS api's). Here's the code I am using in VB.NET:
Public Class VirtualMouseDeviceOpen
Class Enumeration
' Enumerate HID devices
Public Async Function EnumerateHidDevices() As Task
Dim vendorId As UInt32 = &HBEEF
Dim productId As UInt32 = &HFEED
Dim usagePage As UInt32 = &HFF
Dim usageId As UInt32 = &H1
' Create a selector that gets a HID device using VID/PID and a
' VendorDefined usage
Dim selector As String = HidDevice.GetDeviceSelector(usagePage, usageId, vendorId, productId)
' Enumerate devices using the selector
Dim devices As Windows.Foundation.IAsyncOperation(Of Windows.Devices.Enumeration.DeviceInformationCollection) = DeviceInformation.FindAllAsync(selector)
Dim count As Integer = devices.GetResults.Count
If count > 0 Then
' Open the target HID device
' At this point the device is available to communicate with
' So we can send/receive HID reports from it or
' query it for control descriptions
Dim device As HidDevice = HidDevice.FromIdAsync(devices.GetResults.ElementAt(0).Id, FileAccessMode.ReadWrite)
Await Vendor.ReadWriteToHidDevice(device)
Else
' There were no HID devices that met the selector criteria
MsgBox("MUTT HID device not found!", MsgBoxStyle.Exclamation)
End If
End Function
Class Vendor
Public Shared Async Function ReadWriteToHidDevice(device As HidDevice) As Task
If device IsNot Nothing Then
' construct a HID output report to send to the device
Dim outReport As HidOutputReport = device.CreateOutputReport()
' Initialize the data buffer and fill it in
Dim buffer As Byte() = New Byte() {10, 20, 30, 40}
Dim dataWriter As New DataWriter()
dataWriter.WriteBytes(buffer)
outReport.Data = dataWriter.DetachBuffer()
' Send the output report asynchronously
Dim a As Windows.Foundation.IAsyncOperation(Of UInteger) = device.SendOutputReportAsync(outReport)
' Sent output report successfully
' Now lets try read an input report
Dim inReport As HidInputReport = device.GetInputReportAsync()
If inReport IsNot Nothing Then
Dim id As UInt16 = inReport.Id
Dim bytes = New Byte(3) {}
Dim dataReader__1 As DataReader = DataReader.FromBuffer(inReport.Data)
dataReader__1.ReadBytes(bytes)
Else
MsgBox("Invalid input report received")
End If
Else
MsgBox("device is NULL")
End If
End Function
End Class
End Class
Here's my report descriptor to avoid scrimmaging through everything trying to find it:
HID_REPORT_DESCRIPTOR G_DefaultReportDescriptor[] = {
0x06,0x00, 0xFF, // USAGE_PAGE (Vender Defined Usage Page)
0x09,0x01, // USAGE (Vendor Usage 0x01)
0xA1,0x01, // COLLECTION (Application)
0x85,CONTROL_FEATURE_REPORT_ID, // REPORT_ID (1)
0x09,0x01, // USAGE (Vendor Usage 0x01)
0x15,0x00, // LOGICAL_MINIMUM(0)
0x26,0xff, 0x00, // LOGICAL_MAXIMUM(255)
0x75,0x08, // REPORT_SIZE (0x08)
//0x95,FEATURE_REPORT_SIZE_CB, // REPORT_COUNT
0x96,(FEATURE_REPORT_SIZE_CB & 0xff), (FEATURE_REPORT_SIZE_CB >> 8), // REPORT_COUNT
0xB1,0x00, // FEATURE (Data,Ary,Abs)
0x09,0x01, // USAGE (Vendor Usage 0x01)
0x75,0x08, // REPORT_SIZE (0x08)
//0x95,INPUT_REPORT_SIZE_CB, // REPORT_COUNT
0x96,(INPUT_REPORT_SIZE_CB & 0xff), (INPUT_REPORT_SIZE_CB >> 8), // REPORT_COUNT
0x81,0x00, // INPUT (Data,Ary,Abs)
0x09,0x01, // USAGE (Vendor Usage 0x01)
0x75,0x08, // REPORT_SIZE (0x08)
//0x95,OUTPUT_REPORT_SIZE_CB, // REPORT_COUNT
0x96,(OUTPUT_REPORT_SIZE_CB & 0xff), (OUTPUT_REPORT_SIZE_CB >> 8), // REPORT_COUNT
0x91,0x00, // OUTPUT (Data,Ary,Abs)
0xC0, // END_COLLECTION
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x09, 0x02, // USAGE (Mouse)
0xa1, 0x01, // COLLECTION (Application)
0x85, 0x02, // REPORT_ID (2)
0x09, 0x01, // USAGE (Pointer)
0xa1, 0x00, // COLLECTION (Physical)
0x05, 0x09, // USAGE_PAGE (Button)
0x19, 0x01, // USAGE_MINIMUM (Button 1)
0x29, 0x03, // USAGE_MAXIMUM (Button 3)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x25, 0x01, // LOGICAL_MAXIMUM (1)
0x95, 0x03, // REPORT_COUNT (3)
0x75, 0x01, // REPORT_SIZE (1)
0x81, 0x02, // INPUT (Data,Var,Abs)
0x95, 0x01, // REPORT_COUNT (1)
0x75, 0x05, // REPORT_SIZE (5)
0x81, 0x03, // INPUT (Cnst,Var,Abs)
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x09, 0x30, // USAGE (X)
0x09, 0x31, // USAGE (Y)
0x15, 0x81, // LOGICAL_MINIMUM (-127)
0x25, 0x7f, // LOGICAL_MAXIMUM (127)
0x75, 0x08, // REPORT_SIZE (8)
0x95, 0x02, // REPORT_COUNT (2)
0x81, 0x06, // INPUT (Data,Var,Rel)
0xc0, // END_COLLECTION
0xc0 // END_COLLECTION
My UsageId is the first Usage Hex value in the report descriptor I believe (I am still a little confused too). My UsagePage is the hex values in the first Usage_Page in the report descriptor.
Note: the problem with the VB.NET code is that it returns 0 on the count above which means it did not find a device using my criteria.
Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth. - Sherlock Holmes. speak softly and carry a big stick - theodore roosevelt. Fear leads to anger, anger leads to hate, hate leads to suffering - Yoda. Blog -
http://www.computerprofessions.us
I forgot anyone wanting a picture of what the device hierarchy looks like in control panel here it is (HID compliant vendor device is the first one in the report descriptor above I want to access and then the mouse device):
Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth. - Sherlock Holmes. speak softly and carry a big stick - theodore roosevelt. Fear leads to anger, anger leads to hate, hate leads to suffering - Yoda. Blog -
http://www.computerprofessions.us

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DAS
The question is not about x64 machines, The answer was correct for the question. The question is closed. If you have a new question please start a new topic.
Please review the forum guidelines.
http://social.technet.microsoft.com/Forums/en-US/ITCG/thread/a0def745-4831-4de0-a040-63b63e7be7ae
jv

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This question was solved.
View Solution.

Hello Filips,
To get your issue more exposure I would suggest posting it in the commercial forums since the HP Compaq dc7900 Small Form Factor PC is a commercial product. You can do this at Business PCs - Compaq, Elite, Pro.
The support page for your product may be helpful in the meantime:
HP Compaq dc7900 Small Form Factor PC.
I hope this helps!
Thank you for posting on the HP Forums.
I worked on behalf of HP.

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<Personal Information Edited By Host>

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Hi:
Did you try the Vista driver? Normally they work fine for W7.
http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=ob-69143-1&cc=us&dlc=en&lc=en&...=
Another thing you can try is to be connected to the internet. Click on the audio controller in the device manager. Click on the Driver tab. Click on Update Driver and select the automatic search.
Sometimes W7 will pull down a driver from the Windows Update site.
If the above 2 suggestions don't work, try this driver which seems to be the same as the Vista one, but for Windows 7.
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=US&swItem=ob-793...
Paul

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