These methods are working properly for Ribbon tabs. But not working for any Backstage tab ("TabShare","TabInfo", "TabSave" etc..) and crash is occuring.
For example: this.myRibbon.ActivateTabMso("TabShare");
Exception Details:
An exception of type 'System.ArgumentException' occurred in PowerPointAddIn.dll but was not handled in user codeAdditional information: Value does not fall within the expected range.
