public SimpleApi()
{
var numDevs = midiOutGetNumDevs();
MidiOutCaps myCaps = new MidiOutCaps();
var res = midiOutGetDevCaps(0, ref myCaps,
(UInt32)Marshal.SizeOf(myCaps));
res = midiOutOpen(out handle, 0, null, 0, 0);
} // SimpleApi
private static extern int midiOutGetDevCaps(Int32 uDeviceID,
ref MidiOutCaps lpMidiOutCaps, UInt32 cbMidiOutCaps);