How can I add file type to Visual studio 2012 c++ windows store project and add Package Action for windows store JavaScript project

Now I am developing a extension for Visual studio, Now I 'd like to set some file 's default build action in c# and VB.

But now the C++ project and JS project are different with C# and VB

How can I add file type or package action for these project. or Setting default build action( file type for c++, Package Action for JS) for file extension

I set build action for c# and VB project , It only works for c# and VB, please refer:http://blog.andreloker.de/post/2010/07/02/Visual-Studio-default-build-action-for-non-default-file-types.aspx

Can anybody help me?

Thanks,

Jack

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