Accessing built-in (Aero, Luna, etc) named styles

I've got an app with some standard controls (forward/backward buttons,
min/max/close buttons) that I would prefer to take on the look of the native
OS. I have to put these controls in other style templates manually, so I
can't let the underlying framework load the right look itself. I'm trying to
find some way to reference the styles built into the Presentation.Luna, etc.
libraries because if I have to define the look myself, I have to pick a
single one, regardless of the target machine's selected theme. Does anyone
know if this is possible, and if so, how to do it?