DOS Fn 5c01H: Unlock File Access
Expects: AX 5c01H
BX file handle
CX:DX file offset from start of file (CX * 65536)+DX
SI:DI length in bytes of region to lock (SI * 65536)+DI
Returns: AX error code if CF is set to CY
Info: This function unlocks access to a region of the file which was
See fn 5c00H for more details on file locking.
Notes: ■ The offset and length must match exactly with the parameters
used when the lock was applied.
■ It is important that all locks be removed from a file before a
program is terminated.
■ It is recommended that you unlock as soon as possible. Always
try to lock, access the file, and unlock in one operation.
See Also: Network Functions
Directory and File Functions