DOS / Functions / 40

                 INT 21 - DOS 2+ - WRITE TO FILE WITH HANDLE

Input	DOS1	N	DOS2	Y	DOS3	Y	DOS5	Y	Output
AX	40h				Bytes Written / Error Code				AX
BX	File Handle								BX
CX	Number of Bytes to Write								CX
									DX
DS:DX	Address of Buffer				Set if Error				CF

Note:   If CX is zero, no data is written, and the file is truncated or
        extended to the current position

See Also 15h 22h 28h 42h 59h Error Codes