private static extern int midiOutOpen(ref int handle, int deviceID, MidiCallback proc, int instance, int flags);
private static extern int midiOutOpen(ref int handle, int deviceId, MidiCallback proc, int instance, int flags);
[DllImport("winmm.dll")] private static extern int midiOutOpen(ref int handle, int deviceID, MidiCallback proc, int instance, int flags);