TEXTMASK works in conjunction with WIPEOUT.ARX to hide all
entities behind the selected text or mtext. The text object
is then grouped together with the wipeout object such that
they move, copy, erase, etc. together. To update after editing
text, run TEXTMASK again and select the text item to be updated.
The the previous wipeout object will be erased and a new one
will be created