FFUnLock64 Function | |
UnLock a portion of an opened file.
Namespace:
XSharp.Core
Assembly:
XSharp.Core (in XSharp.Core.dll) Version: 2.19
Syntax FUNCTION FFUnLock64(
ptrHandle AS IntPtr,
offset AS INT64,
length AS INT64
) AS LOGIC
public static bool FFUnLock64(
IntPtr ptrHandle,
long offset,
long length
)
Request Example
View SourceParameters
- ptrHandle
- Type: IntPtr
The handle of the opened file you want to unlock. - offset
- Type: Int64
The file offset at which to start unlocking. - length
- Type: Int64
The number of bytes to unlock.
Return Value
Type:
Logic
TRUE if successful; otherwise, FALSE.
Remarks
FFUnLock() unlocks a specified portion of a file.
This permits other processes to access that portion.
The unlocked portion must have been previously locked.
Examples
This example uses FFLock() and FFUnLock() to lock and then unlock the first 300 bytes of a file:
1ptrHandle := FOpen2("c:\data\myfile.txt", ;
2 FO_READWRITE + FO_SHARED)
3IF FFLock(ptrHandle, 0, 300)
4 ? "Locked OK"
5 IF FFUnLock(ptrHandle, 0, 300)
6 ? "UnLocked OK"
7 ENDIF
8ENDIF
See Also Reference
FFUnLock64(IntPtr, Int64, Int64)