How to implement switch CD-ROM
For the operation of the CD-ROM, it can be implemented by the MCISendCommand function.
Below is the code implemented with VC:
// Device ID
DWORD WDEVID;
// Open device parameters
MCI_open_parms mciom
// Set the device name to CD_ROM
MCIM.LPSTRDEVICEPE = "cdaudio";
// Open this device
IF (McISendCommand (0, MCI_open, MCI_Open_Type, (DWORD) & MCIM))
{
Return;
}
// Get the device ID
Wdevid = mciom.wdeviceID;
/ / Open CD-ROM
MCI_set_parms mc.com;
IF (McISendCommand (WDEVID, MCI_SET, MCI_SET_DOOR_OPEN | MCI_SET_OFF, (DWORD) (LPSTR) & mciset)
{
}
// Turn off CD-ROM
IF (McISendCommand (WDEVID, MCI_SET, MCI_SET_DOOR_CLOSED | MCI_SET_OFF, (DWORD) (LPSTR) & MCSET)
{
}
// Turn off the device
McISendCommand (WDEVID, MCI_Close, 0, 0);
