CAtlFile::LockRange
Call this method to lock a region in the file to prevent other processes from accessing it.
Syntax
HRESULT LockRange(
ULONGLONG nPos,
ULONGLONG nCount
) throw( );
Parameters
nPos
The position in the file where the lock should begin.nCount
The length of the byte range to be locked.
Return Value
Returns S_OK on success, or an error HRESULT on failure.
Remarks
Calls LockFile to lock a region in the file. Locking bytes in a file prevents access to those bytes by other processes. You can lock more than one region of a file, but no overlapping regions are allowed. When you unlock a region, using CAtlFile::UnlockRange, the byte range must correspond exactly to the region that was previously locked. LockRange does not merge adjacent regions; if two locked regions are adjacent, you must unlock each separately.
Requirements
Header: atlfile.h