The mciSendString function sends a command string to an MCI device.
The device that the command is sent to is specified in the command string
mciSendString("set cdaudio door open",NULL,0,0);
mciSendString("set cdaudio door closed",NULL,0,0);
The Media Control Interface (MCI) provides standard commands for playing
multimedia devices and recording multimedia resource files. These commands are a
generic interface to nearly every kind of multimedia device.
NOTIFYICONDATA Structure 产生类似托盘的效果
Contains information that the system needs to process taskbar status area