GDI+ HitTest too slow

Hello,

I am drawing some paths on a form, which shall be highlighted on the MouseOver event.
Normally I would use some PointInRect function because it's the fastest, but the problem is that my GDI+ paths are not always rectangles. GDI+ has some hit test functions like the GdipIsVisiblePathPoint function, but - at least on my computer - use incredibly much CPU. If I move the mouse over the form and call this function on every mouse move, my CPU consumption goes up to ~60%, and I'm only trying it with a single path...

I had a look at Mahjong.exe on my Vista laptop, and I was so surprised that there is about 2% CPU consumption when I move the mouse around. I am totally confused why. Is it because they only hittest rectangles?

Could you give me a hint how I should go on?

Thank you very much.

Jonas Hochfelder
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