CanAddClass
Visual Studio 2010
Called by the wizard to verify that the project is compatible with the code wizard the user is trying to run.
function CanAddClass( oProj, oObject );
The wizard calls this function when the parameter PREPROCESS_FUNCTION is in the project control's .vsz file.
It verifies if the Visual C++ Code Model object is available. If the code model is not available, the function reports an error and returns false.