Have you ever wanted to attach additional information to existing AutoCAD entity objects? Perhaps material properties, loading limits or construction details? If so, then you should consider the use of extended data.More>>

One of the more frequently asked questions by AutoLISP programmers who are learning about dialog boxes is how to associate a dialog list box with an AutoLISP data list.More>>

To make an application aware of program events, use the tools in Visual LISP called reactors.More>>

AutoCAD R14 introduced a new object named a lightweight polyline that replaces the complex polyline object.More>>

Dialog-box interfaces can make a world of difference in how well the user community accepts an application.More>>

Dialog boxes are not difficult, but they are different and do require a basic understanding of how they work.More>>

When producing a plan, whether it is for a part to be manufactured, a site layout or a highway bridge, there are a lot of details.More>>

Program ListingsMore>>

Program ListingsMore>>

This month, we depart from the normal discussion of how to program an application and, instead, look into the available application programmer interfaces (APIs).More>>