So I'm making a frame which draws a bitmap that can be replaced at runtime so
if you call (send my-frame set-bitmap *bitmap*) it will switch from displaying
whatever bitmap you had previously to the bitmap you passed it. (its doing a
lot of other stuff and I want the interface to this canvas that's drawing the
bitmap to be through the frame) At least that's the theory. In practice,
whenever I call (send my-frame show #t) the bitmap that's being drawn is locked
permanently. Doesn't matter if the paint-callback fetches the bitmap
dynamically or if I draw in the bitmap's dc. I know the bitmap is getting
updated or switched. Is there something I'm missing or a technique I should be
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