MidiOutProc

The MidiOutProc function is the callback function for handling outgoing MIDI messages. MidiOutProc is a placeholder for the application-supplied function name. The address of the function can be specified in the callback-address parameter of the midiOutOpen function.

void CALLBACK MidiOutProc(
  HMIDIOUT hmo,      
  UINT wMsg,         
  DWORD dwInstance,  
  DWORD dwParam1,    
  DWORD dwParam2     
);
 

Parameters

hmo

Handle of the MIDI device associated with the callback function.

wMsg

MIDI output message.

dwInstance

Instance data supplied by using the midiOutOpen function.

dwParam1

Message parameters.

dwParam2

Message parameters.

Return Values

This function does not return a value.

Remarks

Applications should not call any system-defined functions from inside a callback function, except for EnterCriticalSection, LeaveCriticalSection, midiOutLongMsg, midiOutShortMsg, OutputDebugString, PostMessage, PostThreadMessage, SetEvent, timeGetSystemTime, timeGetTime, timeKillEvent, and timeSetEvent. Calling other wave functions will cause deadlock.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Import Library: User-defined.

See Also

Musical Instrument Digital Interface (MIDI) Overview, MIDI Functions, EnterCriticalSection, LeaveCriticalSection, midiOutLongMsg, midiOutOpen, midiOutShortMsg, OutputDebugString, PostMessage, PostThreadMessage, SetEvent, timeGetSystemTime, timeGetTime, timeKillEvent, timeSetEvent,