Transparent bitmap(image) in windows!

[SMALLp]

Hello everyone!

First I want to apologize for asking question about wxPython on this group.

I'm doing project that uses wx.ScrolledPanel few wx.Bitmap on it. It all 
looks wonderful on Ubuntu and very very bad on windows because images 
aren't transparent. As a found out it is problem that windows drowns 
each image in separate window (or something like that)

I'm looking for best and easiest solution for this problem. I found 
something to bind PAINT event to empty function but it doesn't work 
because of scrolled panel.

Please help!

Thanks!