Detect if the current session is a media extender session from unmanaged code.

I never remember I have a blog...so I thought I'd post some code I helped a tgb member with. The question was "Is there a way for my C++ app to detect if current session is an extender session?". From managed code or host apps this is straight forward using the SDK however I did not know how to do it from unmanaged code. Here is what I came up with (Note: I only spent ~30 minutes on this in between other projects.) Does anyone know of a better way?

BOOL IsMediaCenterExtender()

{

    // Note: GetSystemMetrics is not needed; however, I believe it is faster than WTSQuerySessionInformation.  If your primary usage will be via RDP consider removing

    if ( !GetSystemMetrics( SM_REMOTESESSION ) )

        return FALSE;
    BOOL mcx = FALSE;

    LPTSTR pData = NULL;

    DWORD bytesReturned = 0;
    // Note: Either link wtsapi32.lib or dynamically load wtsapi32.dll w/ LoadLibrary

    if ( WTSQuerySessionInformation( WTS_CURRENT_SERVER_HANDLE, WTS_CURRENT_SESSION, WTSWinStationName, &pData, &bytesReturned ) && ( 6 * sizeof( TCHAR ) < bytesReturned ) && ( 0 == _tcsncmp( _T( "EH-Tcp" ), pData, 6 ) ) )

    {
       
mcx = TRUE;

   }
    WTSFreeMemory(pData);
   return mcx;

}