diskcaps.txt

直接读取磁盘逻辑扇区

 This simple component encapsulates two API functions:
 GetVolumeInformation and GetDriveType
 It allows to check:

 Drive Volume Label
 Drive Serial Number
 Drive file system type
 Length of directory component (unfortunatelly this function returns
                                255 chars almost always :( even in case of
                                MSDOS 8+3)
 and Drive System Flags (which you have to test by you self - in this version)

 you can also change Drive Volume Label
 ChangeDiskLabel(NewLabel:string);
 and...
 If you enable CheckSNChange property - every time Serial Number of removable
 media changes OnSNChange fires. It is similar to Autorun function in system.

 Brief description of properities:

    property DiskLabel: Volume Label of disk pointed by Drive property.
    property DiskSerial: Serial Number of disk. (In Hexadecimal format)
    property ComponentLen: Length of directory component length.
    property FileSystem: File System of drive NTFS, HPFS...
    property DriveType:  0	The drive type cannot be determined.
                         1	The root directory does not exist.
                         2	The drive can be removed from the drive.
                         3	The disk cannot be removed from the drive.
                         4	The drive is a remote (network) drive.
                         5	The drive is a CD-ROM drive.
                         6	The drive is a RAM disk.
    property Drive:      Drive letter
    property CheckSNChange: Enables checking Drive Serial Number state
                            of selected drive.

    property OnDriveChanged: This event is fired every time you change Drive letter
                             allowing update of connected components
    property OnSNChanged:    This event is fired every time Serial Number changes
                             It happen also when CD ROM is ejected (serial no. becomes 0)

    procedure ExamineDrive: This procedure updates state of component.

    Important: Changing Drive property disables CheckSNChange.

    This component is freeware.
    I guarantee you nothing concering this code, but you can use it as you wish.

    Happy coding

    Radoslaw Przybyl
    PRO-media CD
    Poland

    [e-mail]
    Any comments will be welcome.

    V 1.0 - 15.07.97