My program converts images on consle with ImageMagick while I 'm selecting proper image on database application. So I don't want to wait the conversion process while I am working to select proper image.

After reading your comments, one thing I can think of... to create little Tk widget with quit button and disconnect from database with callback function or widget destroy event.

ctrl + c is very handy for me, I would like to have some kind of key press event handler like solution for console, if I could...

Thnaks for your reply.