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Using midiOutShortMsg to Send Individual MIDI Messages

  • Article

The following example uses the midiOutShortMsg function to send a specified MIDI event to a given MIDI output device:

UINT sendMIDIEvent(HMIDIOUT hmo, BYTE bStatus, BYTE bData1, 
    BYTE bData2) 
{ 
    union { 
        DWORD dwData; 
        BYTE bData[4]; 
    } u; 
 
    // Construct the MIDI message. 
 
    u.bData[0] = bStatus;  // MIDI status byte 
    u.bData[1] = bData1;   // first MIDI data byte 
    u.bData[2] = bData2;   // second MIDI data byte 
    u.bData[3] = 0; 
 
    // Send the message. 
    return midiOutShortMsg(hmo, u.dwData); 
}
  • Note   MIDI output drivers are not required to verify data before sending it to an output port. Applications must ensure that only valid data is sent.