请教vc++程序员

[javaduke]

请问用GetDriveType函数，如何判断是什么disk，如何判断是Dvd还是vcdRom.

[mjs2000]

GetDriveType
The GetDriveType function determines whether a disk drive is a removable, fixed, CD-ROM, RAM disk, or network drive.

UINT GetDriveType(
LPCTSTR lpRootPathName // pointer to root path
);

Parameters
lpRootPathName
Pointer to a null-terminated string that specifies the root directory of the disk to return information about. If lpRootPathName is NULL, the function uses the root of the current directory.
Return Values
The return value specifies the type of drive. It can be one of the following values:

Value Meaning
DRIVE_UNKNOWN The drive type cannot be determined.
DRIVE_NO_ROOT_DIR The root directory does not exist.
DRIVE_REMOVABLE The disk can be removed from the drive.
DRIVE_FIXED The disk cannot be removed from the drive.
DRIVE_REMOTE The drive is a remote (network) drive.
DRIVE_CDROM The drive is a CD-ROM drive.
DRIVE_RAMDISK The drive is a RAM disk.

[javaduke]

哪操作系统是如何判断Dvd和Vcd的？