From the AutoCAD Readme file. Microsoft VBA is available for free download at http://www.autodesk.com/vba-download. Autodesk is transitioning from VBA technology to VSTA and .NET support. This transition will occur over several years. During this time, Autodesk will provide documentation and other assistance to help customers and developers migrate from VBA to this new automation technology. VBA will be fully supported in Autodesk products, including and -based products. Once VBA is installed, your existing VBA-based applications should run as in previous releases of AutoCAD.