void CallTestByName(string procName, [MarshalAs(UnmanagedType.IDispatch)] out object test2Add);

object[] parameters = { getTestClassFactoryProcedureName(className), new Object() };
ParameterModifier p = new ParameterModifier(2);
p[1] = true;
ParameterModifier[] modifiers = { p };
 
OfficeApplication.GetType().InvokeMember("Run", BindingFlags.InvokeMethod, null, OfficeApplication, 
                                         parameters, modifiers, null, null);