gtk3-runtime3.8.132-bit is the GTK_Runtime.
You sent through gtkdTest.exe to another poster chasing the same problem. The output from this is"object.exception@..\\gtkc\Loader.d(123): Library load failed: libgtk-3-0.dll"
I seem to be having the same load dll issues with Derelict. I am on XP sp3.
Also, the BASE_PATH was in conjunction with setting the path variable to the Gtk-Runtime bin.