Sleak is a good tool but it lacks information about Widget handlers. You can list the Shells, Composites and controls from the Display object. display.getShells(), shell.getChildren(), composite.getChildren(). It is more complicated with menu Widgets that are not bound to a Control. They are listed in the menus array in the Decorations class that the Shell extends but not visible :( If anyone has found a way to access the fill list of Widgets or the menu array without changing the SWT source, please comment.