INT 6F - 10NET - UNLOCK HANDLE AH = 08h BX = file handle AL = mode 00h unlock all 01h unlock record at CX:DX Return: CF clear if successful CF set on error AX = error code (see also AH=00h) 0002h file not found SeeAlso: AH=07h,AH=0Fh,INT 21/AH=5Ch