MidiOutProc typedef Null safety

MidiOutProc = Void Function(IntPtr hmo, Uint32 wMsg, IntPtr dwInstance, IntPtr dwParam1, IntPtr dwParam2)

Application-defined 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.

Implementation

typedef MidiOutProc = Void Function(IntPtr hmo, Uint32 wMsg, IntPtr dwInstance,
    IntPtr dwParam1, IntPtr dwParam2);