Visual Studio with gtkD

[RedshiftVelocities via Digitalmars-d-learn]

I'm trying to compile a gtkD program with VisualD. I've been 
following this guide 
(https://github.com/gtkd-developers/GtkD/wiki/Installing-on-Windows) and I can compile just fine directly from the command line. However, in VS, I get numerous errors in the form of "Error: module `Main` is in file 'gtk\Main.d' which cannot be read". I can compile non-gtk D programs just fine in VS. Any advice? Thanks!