how to properly GetTypeFromProgID for visual studio 2008

I am following the instructions here:

http://msdn.microsoft.com/en-us/library/ms228772(v=vs.80).aspx

for .net 3.5 visual studio 2008 to fix this issue:

call was rejected by callee

for this line of code:

t = System.Type.GetTypeFromProgID("VisualStudio.DTE.8.0",
              true);

I am getting this error:

COMException was unhandled: Invalid class string (Exception from HRESULT: 0x800401F3 (CO_E_CLASSSTRING))

Does anyone know what this means, and what am I doing wrong?

thank you so much for your guidance.

Your code doesn't match the tag you used. VS2008 is Visual Studio version 9.0. So the proper progid is VisualStudio.DTE.9.0. The full list of version numbers:

• VS2002 : 7.0
• VS2003 : 7.1
• VS2005 : 8.0
• VS2008 : 9.0
• VS2010 : 10.0
• VS2012 : 11.0
• VS2013 : 12.0

You can also use the VisualStudio.DTE progid. You'll get whatever version of VS was installed last. A bit random.