Stacks Shapes Via Pictures

[Scott Kane]

Hi people,

Very hot here today.  Hotter up north though,
40 + deg C.

Anyway, I have a question on creating Stacks in
the shape of a particular picture.  I know I saw
and example somewhere, but I can't remember where
and it doesn't seem to be on Rev Online.  Basically
what I'm needing is a method to make a stack (the main
"window") take the shape of an image (bitmap etc) and
make the corners transparent so that only the image is displayed.

Any help gratefully appreciated!

Cheers

Scott