mciSendString

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);

MCI

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  產(chǎn)生類似托盤的效果

Contains information that the system needs to process taskbar status area messages.