INT 2F CU - NETWORK REDIRECTOR (DOS 3.x only) - UNLOCK REGION OF FILE AX = 110Bh BX = file handle CX:DX = starting offset SI = high word of size STACK: WORD low word of size ES:DI -> SFTsee System File Table for file SFTsee System File Table DPBsee Drive Paramter Block field -> DPBsee Drive Paramter Block of drive containing file Return: CF set on error AL = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h) STACK unchanged Note: this function is called by the DOS 3.1-3.31 kernel; DOS 4.0+ calls AX=110Ah instead SeeAlso: AX=110Ah,INT 21/AH=5Ch