Hi Guys,
I am doing some project in which i have to implement a spirit level
(http://en.wikipedia.org/wiki/Spirit_level)

I have prepared a png file with the spirit levell frame, and parts where liquid is are transparent (but i kept the black lines because they need to be on the top)

I also prepared the image of the air bubble.

Now i am trying to stack it all together on the form and the bubble image(pictureBox) is below the png frame(pictureBox, Image PNG, backgroundColor transparent), however it cannot be seen in the transparent parts of the frame, i can only see the background image of the panel (in which are images) there.

Is there any way to make the image visible?

I am working in VS2005 under windows forms in c++

Thanks in advance,
Smallbit