Since AutoCAD 2014, the software uses the , which supports both 32-bit and 64-bit environments. However, the VBA module is no longer included in the default installation and must be added separately as a "VBA Enabler". 1. Installation & Setup

You must match the bitness of the module to the bitness of your AutoCAD. If you are running 64-bit AutoCAD (the most common installation), you need the 64-bit VBA module. The 32-bit module will not work on a 64-bit OS with 64-bit AutoCAD.

Transitioning existing 32-bit VBA macros to the 64-bit 2015 module requires several specific code updates: