Certain desktop managers that allow positioning of windows need to know the coordinates of the windows. Using this utility you can find the upper left hand and lower right hand window coordinates easily.
Simply copy the desktop you are planning to customize by typing Shift-PrtSc. The Paste Desktop command pastes a snapshot of the screen onto the background, where it can be measured. Clear clears the screen.
While pressing the left arrow, click the mouse on the upper left hand corner of the window. The coordinates will appear in the left field. While pressing the right arrow, click the mouse on the lower right hand corner of the window. The lower right hand coordinates will appear in the right field.
Additional information may be found by clicking on "Get Mouse Position". To leave help, simply click anywhere in this help box.