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WIDM_GETPOS
 
        This message is sent to a waveform input device driver to
        request the current input position for a waveform. The input
        position is relative to the first recorded sample of the
        waveform.
 
Parameters
        DWORD dwParam1
            Specifies a far pointer to an MMTIME structure.
 
        DWORD dwParam2
            Specifies the size of the MMTIME structure.
 
Return value
        The return value is an error code, or zero (MMSYSERR_NOERROR) if
        the operation is successful. Possible error codes are:
 
        MMSYSERR_NOTENABLED
            The driver failed to load or initialize.
 
Comments
        The wType field of the MMTIME structure indicates the time format
        requested by the client. If the driver cannot support the
        requested format, it should return the position in a format that
        it does support, and change the wType field accordingly.
 
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