INT 21 - DOS 2+ - GET FILE'S LAST-WRITTEN DATE AND TIME

	AX = 5700h
	BX = file handle
Return: CF clear if successful
	    CX = file's time (see #01665)
	    DX = file's date (see #01666)
	CF set on error
	    AX = error code (01h,06h) (see #01680)
Note:	under DR DOS 3.41 and 5.0, this function returns 0 (no date/time) for
	  character devices; MS-DOS returns date and time of opening
SeeAlso: AX=5701h,AX=5704h"Windows95"