TKmirrorPICT is used to display the button selected from the Alignment palette in the Alignment Tools section of this stack. See TKmirrorPICT in the ToolKit‚Ñ¢ XCMDs section for details.
This XCMD will copy any rectangle on the screen (not just the window) to any target rectangle on the screen. I wanted to make sure the user had a visual reference to the button they were reading about and I did not want to fill my stack with PICTs for each button.