/// <summary>
/// Get a list of device interfaces from an Interface GUID.
/// </summary>
/// <param name="interface_class_guid">The interface class GUID for the device.</param>
/// <param name="device_id">Optional device ID.</param>
/// <param name="all_devices">True to get all devices, otherwise just present devices.</param>
/// <returns>List of device interfaces.</returns>
public static IEnumerable <string> GetDeviceInterfaceList(Guid interface_class_guid, string device_id, bool all_devices)
{
CmGetDeviceInterfaceListFlags flags = all_devices ? CmGetDeviceInterfaceListFlags.AllDevices : CmGetDeviceInterfaceListFlags.Present;
while (true)
{
var result = DeviceNativeMethods.CM_Get_Device_Interface_List_Size(out int length, ref interface_class_guid, device_id, flags);
if (result != CrError.SUCCESS)
{
throw new ArgumentException($"Couldn't get device interface list size. Error: {result}");
}
char[] buffer = new char[length];
result = DeviceNativeMethods.CM_Get_Device_Interface_List(ref interface_class_guid, device_id, buffer, buffer.Length, flags);
if (result == CrError.SUCCESS)
{
return(new string(buffer).Split(new char[] { '\0' }, StringSplitOptions.RemoveEmptyEntries));
}
if (result != CrError.BUFFER_SMALL)
{
throw new ArgumentException($"Couldn't get device interface list. Error: {result}");
}
}
}
internal static extern CrError CM_Get_Device_Interface_List_Size(out int pulLen, ref Guid InterfaceClassGuid,
string pDeviceID, CmGetDeviceInterfaceListFlags ulFlags);
internal static extern CrError CM_Get_Device_Interface_List(ref Guid InterfaceClassGuid, string pDeviceID,
[Out] char[] Buffer, int BufferLen, CmGetDeviceInterfaceListFlags ulFlags);
