public int SendSysex(byte[] sx)
{
int result = -1;
int shdr = Marshal.SizeOf(typeof(MidiHeader));
var mhdr = new MidiHeader();
mhdr.bufferLength = mhdr.bytesRecorded = sx.Length;
mhdr.data = Marshal.AllocHGlobal(mhdr.bufferLength);
Marshal.Copy(sx, 0, mhdr.data, mhdr.bufferLength);
IntPtr nhdr = Marshal.AllocHGlobal(shdr);
Marshal.StructureToPtr(mhdr, nhdr, false);
result = WinMM.midiOutPrepareHeader(outHandle, nhdr, shdr);
if (result != 0)
{
throw new Exception("Cannot prepare OUT header");
}
result = WinMM.midiOutLongMsg(outHandle, nhdr, shdr);
if (result != 0)
{
throw new Exception("Cannot send long message");
}
result = WinMM.midiOutUnprepareHeader(outHandle, nhdr, shdr);
if (result != 0)
{
throw new Exception("Cannot ");
}
AfterLongSent?.Invoke(sx); // if not null Invoke
return(result);
}
