Publisher's Note Culled from the files of 'CADALYST' magazine's most popular column-'Hot Tip Harry'-these tips include AutoLISP routines, dialog box routines, hatch patterns, menu macros, blocks, script files and more. Nearly all work with Release 12 and 13 under both DOS and Windows. The routines are not simply models of good programming practice; they improve the user's AutoCAD efficiency as well.