Abstract: A sliding latch and locking mechanism, for windows and doors, whereby the latching mechanism provides a means for discrete position retention of a sliding window or door and provides an increased measure of security. The latching system combines four modes of operation i.e. lock, close only, raise (free sliding), and tilt to provide angular pivoting of window sash, that allow three levels of security, i.e. fully locked, close only with discrete positions maintained, and raise or lower without discrete positions maintained (free sliding). The latching system security levels are accomplished by means of a selector knob positioned to the desired mode of operation. Also, a mechanism is integrated to provide interlocking in the fully closed position with the upper or adjacent window or door sash.