This AutoCAD routine from Raymond Rizkallah constructs window frame dividers in elevation. There are two different functions available after you load the LISP routine. DIV will draw an array of squares or rectangles based on prompts that determine the spacing and number of divisions (see examples below). DIV1 will do the same thing, except that divider lines are included between the rectangles. Both routines create entities on the current layer and automatically enable END and INT object snaps to aid in picking points.