Is it possible to have different screen resolution for different users logged at the moment into the system? When I switch user and change screen resolution windows changes resolution for all the other users also.
This isn't a perfect solution, but it's close to what you're asking for. Set up a single user as the test user so the desktop icons on your main user account don't get messed up, then use a resolution-switching utility such as Display Changer to change resolutions. You could simply create a separate Windows shortcut for each resolution, or create a set of batch files that automatically run Display Changer with different arguments before running your app.