I'm creating a VSTO Add-in for Microsoft Excel. I created a custom tab via Ribbon UI designer. But I does not show up when I launch Excel. Add-in is loaded, as I see it in COM-objects on DEVELOPER tab.
There are a lot of step-by-step tutorials, but following them does not help me.
How should I make my custom tab visible in Excel Workbook?
VSTO provides two main ways for customizing the Ribbon UI (aka Fluent UI):
Do you get any UI errors in Excel? See How to: Show Add-in User Interface Errors for more information.