At ArcGIS 10.1, the VBA runtime is installed by the setup.exe of the ArcGIS VBA Compatibility setup program. Previous to ArcGIS 10, the VBA Runtime was installed by the ArcGIS for Desktop setup.
To run the ArcGIS VBA Compatibility setup, use the setup.exe located in the \ArcGIS_VBA folder on the installation media or download folder, or select the ArcGIS for Desktop VBA Compatibility link on the ArcGIS for Desktop startup menu.
