The Pitfalls of MsCoree.dll

The Visual Studio setup project created when you create a COM add-in using the Shared Add-In Wizard provides a setup package that you can use to deploy your COM add-in to your customers' machines. At first glance, the setup created by Visual Studio appears to cover all the deployment requirements for COM add-ins, but alas life is not quite that easy. A deployed COM add-in written in managed code really needs to be "shimmed." To understand what a shim is and why it is needed, we have to dig into how a COM add-in written in managed code is actually loaded into an Office application.

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