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'#define CTL_CODE(t ,f,m ,a ) (((t)<<16)|((a)<<14)|((f)<<2)|(m))
'#define FSCTL_LOCK_VOLUME CTL_CODE(FILE_DEVICE_FILE_SYSTEM,6,METHOD_BUFFERED,FILE_ANY_ACCESS)
'#define FILE_DEVICE_FILE_SYSTEM 9
'#define METHOD_BUFFERED 0
'#define FILE_ANY_ACCESS 0x00000000
(((9)<<16)|((0)<<14)|((6)<<2)|(0))
10010000000000000000
11000
10010000000000011000
&H 9 0 0 1 8
Const FSCTL_LOCK_VOLUME As Long = &H00090018