Program: Dxtory 2.0.118 - http://dxtory.com/v2-home-en.html
Sandboxie version 3.81.03
Win7 Ultimate 64-bit

Problem: After installing Dxtory in it's own sandbox it appears to run fine but it doesn't detect BF3 (I've only attempted to use Dxtory with BF3).
I'm guessing there's some files that I have to give direct/full access to but I'm not sure what they are. Any ideas?

This might be connected in some way to my OpenGL issues.. Since they both rely on interaction with the graphics hardware.

http://www.sandboxie.com/phpbb/viewtopic.php?t=13370

Thanks, I'll keep an eye on that thread.

I don't think this problem has to do with OpenGL. I fixed that OpenGL issue already, by the way.

I don't know what Dxtory is or how it works, but assuming that your Battlefield 3 is outside the sandbox, and that Dxtory is looking for the Battlefield 3 window, you can try to enable the (only) checkbox in the settings page in Sandboxie Control > Sandbox Settings > Accessibility, to permit that kind of access.