Testing if Adobe components are installed on the system

Does anyone know how to test if 开发者_如何学Pythona given Adobe component (Illustrator, or Photoshop, whatever) is installed on a system (Windows7). Probably this would be a variable stored in a registry, but what exact key would this be?

If you've installed those, you can check out yourself: using regedit, in a command-console (Start->Run->"regedit").

It might be in HKEY_CURRENT_USER\Software\Adobe\. Since I've only installed Acrobat Reader (which is also an Adobe component), it was at HKEY_CURRENT_USER\Software\Adobe\Acrobat Reader. You can, perhaps, also get a version number, by checking for the following key. For Adobe Reader it was: HKEY_CURRENT_USER\Software\Adobe\Acrobat Reader\8.0