AutoCAD Platform Customization: User Interface, AutoLISP, VBA, and Beyond

Creating and Modifying Drawing Objects

All drawings start off as an idea. Maybe it's just in your head, or maybe it became a sketch done on a napkin over lunch. The idea or sketch is then handed over to a drafter or engineer, who creates a set of drawings that will be used to communicate the final design. The final design is then used to manufacture the parts or construct the building. A drafter or engineer completes a design using a variety of objects, from lines to circles, and even splines and hatch patterns.

Although adding objects to a drawing is how most designs start off, those objects are often used to create new objects or are modified ...