DupLockFromFH

Gets a Lock on an open file (V36)

Obtain a Lock on the object associated with fh. Only works if the file was opened using a non-exclusive mode. Other restrictions may be placed on success by the file system.

fh

Opened file for which to obtain the Lock

DupLockFromFH() may show unpredictable behaviour if the ChangeMode() function was used with a mode which is none of MODE_NEWFILE, MODE_OLDFILE or MODE_READWRITE.

lock

Obtained Lock or NULL for failure

DupLock(), Lock(), UnLock(), ChangeMode()