pinvoke.net: Edit: winmm.MidiOutCaps

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Summary: The MIDIOUTCAPS structure describes the capabilities of a MIDI output device.

!!!!C# Signature:
    [StructLayout(LayoutKind.Sequential)]
    struct MIDIOUTCAPS
    {
        public ushort wMid;
        public ushort wPid;
        public uint vDriverVersion;     //MMVERSION
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst= 32)]
        public string szPname;
        public ushort wTechnology;
        public ushort wVoices;
        public ushort wNotes;
        public ushort wChannelMask;
        public uint dwSupport;
    }

// values for wTechnology field of MIDIOUTCAPS structure
    private const ushort MOD_MIDIPORT = 1;         // output port
    private const ushort MOD_SYNTH = 2;            // generic internal synth
    private const ushort MOD_SQSYNTH = 3;          // square wave internal synth
    private const ushort MOD_FMSYNTH = 4;          // FM internal synth
    private const ushort MOD_MAPPER = 5;           // MIDI mapper
    private const ushort MOD_WAVETABLE = 6;        // hardware wavetable synth
    private const ushort MOD_SWSYNTH = 7;          // software synth

// flags for dwSupport field of MIDIOUTCAPS structure
    private const uint MIDICAPS_VOLUME = 1;      // supports volume control
    private const uint MIDICAPS_LRVOLUME = 2;    // separate left-right volume control
    private const uint MIDICAPS_CACHE = 4;
    private const uint MIDICAPS_STREAM = 8;      // driver supports midiStreamOut directly

!!!!User-Defined Types:
None.

!!!!Alternative Managed API:
Do you know one?  Please contribute it!

!!!!Notes:
None.

!!!!Tips & Tricks:
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!!!!Sample Code:
Please add some!

This is sample Code
MidiOutCaps outCaps = new MidiOutCaps();
int result = midiOutGetDevCaps(deviceID, ref outCaps, Marshal.SizeOf(outCaps));

Documentation: MIDIOUTCAPS@msdn on MSDN