WinAPI: midiOutMessage - 向 MIDI 输出设备发送一条消息

//声明:
midiOutMessage(
  hMidiOut: HMIDIOUT; {设备句柄}
  uMessage: UINT;     {消息}
  dw1: DWORD          {消息参数}
  dw2: DWORD          {消息参数}
): MMRESULT;          {函数成功返回发送的消息}


//举例: