Question

I have a window with a WS_EX_LAYERED style and it has a alpha color key of magic pink (0xFF,0,0xFF).
I’m trying to draw a PNG image over that window using GDI+ and it shows shades of pink around the icon edges (where the alpha blend is applied).
Here’s an example:

http://img834.imageshack.us/img834/8241/stackoverflow.png

How can I draw the image with the real background (the one’s behind my window) alpha blend and not the color key?

Thanks for help,
Omer

Answer 1

Some points to check over:

1. Have you seen the docs on MSDN?
2. What options have you fed into your BLENDFUNCTION struct?
3. How are you loading your .png?
4. Does your image have an alpha channel?