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MIDM_STOP
 
        This message is sent to a MIDI input device driver to end
        recording of incoming MIDI data.
 
Parameters
        DWORD dwParam1
            Unused.
 
        DWORD dwParam2
            Unused.
 
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
        If there is a buffer in the input queue that contains any
        system-exclusive data, the driver should set the MHDR_DONE bit
        and clear the MHDR_INQUEUE bit in the dwFlags field of the
        MIDIHDR structure identifying the buffer. It should then put
        the number of actual bytes recorded in the dwBytesRecorded field
        and return the buffer to the client by sending a MIM_LONGDATA
        message with the DriverCallback function. Any empty buffers
        should remain in the queue.
 
        While recording is stopped, the driver should maintain the
        current MIDI status byte for running status events and the
        parsing state for multi-byte events. If this message is
        received and recording is already stopped, the driver should
        return MMSYSERR_NOERROR.
 
See also
        MIDM_START, MIDM_RESET
 
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