Thank you for writing.
Each control is responsible for handling its own events no matter if it is transparent or not. A possible solution would be to create a custom button and override its WndProc method and listen for the WM_NCHITTEST
message. Then you can modify it and make your control transparent for all mouse events.
If you do this you would be able to handle the click event with whatever control lies under your button. Please check the following forum thread discussing a similar scenario: http://stackoverflow.com/questions/547172/pass-through-mouse-events-to-parent-control#8635626
I hope this helps. Should you have further questions please do not hesitate to write back.
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