I have developed a VSTO Addin in Visual Studio with C#. It is packaged into a MSI by using a Setup Project in VS.
When installed, it creates a Custom Ribbon Tab "Test" in Excel with a few Controls.
Now I want my similar second/third/... Addins to be installed under the same tab "Test".
If I just create a Custom Ribbon in, say, Addin2 named "Test", it just creates a second one when both Addins are installed, instead of displaying both controls under one tab.
Is there any control in VS that allows multiple Addins to share one Tab or is there a workaround for VSTO Addins?