how to auto-unload a custom add-in in PowerPoint using C# VSTO?

StackOverflow https://stackoverflow.com/questions/23076682

  •  03-07-2023
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Question

I have created an add-in in PowerPoint 2010. I need to check the current version of the PowerPoint being used by the user and if the current version is less than 14.0, I need to show a message and also that the add-in is unloaded automatically(or the user is not able to install or select the add-in).

Is there an easy way to do this? I am using C#. Thanks.

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Solution

See COMAddIns.Item and COMAddIn.Connect.

COMAddIn addin = Application.COMAddIns.Item("yourAddinProgId");
addin.Connect = false;

This will cause the Shutdown event of your Add-In to be raised. But you'll have to do all the cleanup yourself (undo everything you did on startup).

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