This function returns a handle to a tuner resource.
HANDLE TunerOpen( DWORD dwTuneridentifier );
A valid tuner handle indicates success. INVALID_HANDLE_VALUE indicates failure.
The handle returned by this function is used when calling other tuner functions. When a tuner is opened, the system initializes and configures the device in a default state. To determine this initial configuration, an application calls TunerGetConfig.