Hello all, I'd like to develop a simple program that: when mouse is over a text element on a generic applications like text editors or browsers, after a certain delay or with a short-cut key, it will display an hovering balloon displaying the word's definition. I've seen applications like this, but don't know how they work in terms of capturing keyboard events of generic applications to invoke itself up on top of it. Also, is application like this possible to develop in java, TCL/TK?, or do I have to stick with platform specific tech?