title: Excel VSTO fails to load if there are VBA macros
body: <p>I have an excel XLS developed with Visual Studio Tools For Office (VSTO) 2005. Most of the code is in C# VSTO, but there is also a VBA macro to implement a worksheet function. I'm <em>not</em> trying to have the VBA and C# talk to each other, or anything like that. It's just a worksheet function.
     But in Excel 2007 -- if the user has macros disabled, then that VBA prevents the VSTO from running. (Error message: "The customization assembly could not be found or could not be loaded.") If I remove the VBA, then the VSTO loads fine.
     But the VBA macro isn't crucial, so I don't want to abort loading of the entire VSTO sheet. The rest of the functionality should work even if macros are turned off. </p>
  
  <p>Is there any way I can force Excel to continue loading the VSTO even if the VBA is disabled?</p>