AppleScript to repeat action in the next window

If you need to do something and hold it down, try something like this:

                tell application "System Events"
                    tell process "Photoshop"
                        option key down
                    end tell
                end tell
                DO OTHER STUFF HERE
                tell application "System Events"
                    tell process "Photoshop"
                        option key up
                    end tell
                end tell

I just hacked together this little tool.

https://github.com/vorgos/QuickGrab

It is a command line tool that will capture the top most active window or any window you specify just like the -l option in the newer version of screencapture.

Hope that helped.