The mciGetDeviceID function retrieves the device identifier corresponding to the name of an open device.
MCIDEVICEID mciGetDeviceID( LPCTSTR lpszDevice );
Pointer to a null-terminated string that specifies the device name or the alias name by which the device is known.
Returns the device identifier assigned to the device when it was opened if successful. The identifier is used in the mciSendCommand function. If the device name is not known, if the device is not open, or if there was not enough memory to complete the operation, the return value is zero.
Each file for a compound device has a unique device identifier. The identifier of the "all" device is MCI_ALL_DEVICE_ID.
** Windows NT/2000/XP:** Included in Windows NT 3.1 and later.
** Windows 95/98/Me:** Included in Windows 95 and later.
** Header:** Declared in Mmsystem.h; include Windows.h.
** Library:** Use Winmm.lib.
** Unicode:** Implemented as Unicode and ANSI versions on Windows NT/2000/XP.