Change box is part of 'XPress Scripts 1.0' a package of twelve AppleScripts for use with QuarkXPress 3.3.
Change Box works in the same way as several shareware Xtensions in that it changes a selected text box to a picture box and vice versa. All box attributes are retained, i.e. color, shade, rotation, skew etc. If the box has any contents, whether it be text or pictures, these will be lost on conversion, and as per normal Apple Event / scripting convention, you cannot implement the undo command if you err.