How can I persist data for an Excel Ribbon Addin in Excel
I have created an Excel ribbon addin which needs to persist user selections between Excel sessions. Using custom XML Parts seems to be the best option for this. However I can't get this to work without getting COMExceptions. The MSDN docs are just not very useful (http://msdn.microsoft.com/en-us/library/bb608612.aspx). Can someone give me an example of making this work in an Excel Ribbon addin? There are three different methods I know of: Custom XML parts For an application-level add in, this is my preferred method of storing any application data that needs to be persisted in a saved xls file