Select all cells on the canvas

Hello everybody,

I have made a little example called CutCopySelectAll on my site
You can find it underneath the Under Construction bar.

url: http://members.home.nl/peterkiers/

When I choose Test -> Test Field On.
some data will be displayed on the TImage Canvas.
When I choose Edit -> Select All, only the cells that
are filled with characters will be selected, but I want
to select all cells.

Who can help me fix to fix that?

Greetings,

Peter Kiers