C# Signature:

[DllImport("CfgMgr32.dll", CharSet = CharSet.Unicode)]
static extern uint CM_Get_Device_Interface_List(ref Guid interfaceClassGuid, string deviceID, char[] buffer, uint bufferLength, uint flags);

Notes:

Cannot use StringBuilder for buffer, since the buffer may contain several null terminated strings.

Sample Code:

static string[] GetDeviceInterfaces(Guid guid) {
     uint size;
     var result = CM_Get_Device_Interface_List_Size(out size, ref guid, null, 0);
     if (result != 0) throw new Exception("Unable to retrieve device interface list size: " + result);    

     var buffer = new char[(int)size];
     result = CM_Get_Device_Interface_List(ref guid, null, buffer, size, 0);
     if (result != 0) throw new Exception("Unable to retrieve device interface list: " + result);

     return new string(buffer).Split(new char[] { '\0' }, StringSplitOptions.RemoveEmptyEntries);
}

Please edit this page!

Do you have...

• helpful tips or sample code to share for using this API in managed code?
• corrections to the existing content?
• variations of the signature you want to share?
• additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).