I have a possible client (my first one) that is very keen to secure the 
program I develop against illegal replication. I haven't found anything in 
metacard that helps me with this. Is there a computer id or something that 
can be accessed fom within metacard? What do other people do?

Thanks to everyone who helped me with the ellipse thing. I have now found 
the equation for a superellipse and it suits my purposes perfectly. I can 
now find the coordinates of ellipses with different shaped curves.

Also thanks to Xavier for the very simple method to determine whether the 
mouse is inside or outside the points of a polygon.

Monte Goulding
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