Understanding the ActiveX Code in gp:drawOutline

Enabling the Boundary Outline Drawing Function

Obtaining a Pointer to Model Space

 

AutoLISP Tutorial > Drawing the Path Boundary > Enabling the Boundary Outline Drawing Function > 

Ensuring That ActiveX Is Loaded

ActiveX functionality is not automatically enabled when you start AutoCAD or VLISP, so your programs must ensure that ActiveX is loaded. The following function call accomplishes this:

(vl-load-com)

If ActiveX support is not yet available, executing vl-load-com initializes the AutoLISP ActiveX environment. If ActiveX is already loaded, vl-load-com does nothing.