The IVGridCtrl is based on the MFC Grid Control described here:
You can view the methods and properties in MSOffice VBA Object Browser. Use the Tools -> References menu, browse to SDD_HOME/common/win32/lib/IVGridCtrl.ocx, and then View -> Object Browser (F2) and choose IVGRIDCTRLLib in the Library dropdown:
You can also look at the RefDes example that uses the grid here:
Thank you for the detailed references. That is what I need.