Excel permits users to extend its behavior with VBA macros, automation controllers and add-ins. But attempting to extend Excel when using the Contributor Add in for Excel is strictly at your own risk since doing so might produce unexpected results. Cognos cannot guarantee that any non-Cognos extension will operate as planned when Contributor for Excel is installed.
However, simple one-time action macros, like button macros to navigate a worksheet are likely to work. Furthermore, note that Contributor for Excel is for the most part inactive when you work in a workbook that does not contain a Contributor planning model. Therefore, a non-Cognos extension is more likely to operate as planned when you work in a non-Planning workbook than when you work in a Planning workbook.
Contributor for Excel is compatible with other Cognos add-ins such as Contributor Export for Excel.
Although the Add-in is installed within your copy of Excel, it only activates when you either log on to a Contributor Web site or load a saved Excel workbook containing a Contributor planning model.