New Post: Using project environment variables

Hi,

i want to say something like that:

new Project("MyProject",
                    new Dir(@"%ProgramFiles%\MyProject",
                        new File(
                            @"..\bin\$(var.MyProject.PlatformName)\$(var.MyProject.ConfigurationName)\MyProject.exe")));

I get : "error CNDL0150: Undefined preprocessor variable '$(var.MyProject.PlatformName)'" ?

Regards

PS: a reference to project "MyProject" was added!