Why are my windows transparent?

[kingting]

I have actually fixed this problem thanks for all the help!

[black_atus]

hi all,
I have a question about Image Editor(Visual C++ 2010).
Do someone knows if there's a link between the first pixel of a bitmap file and the background color that C++ interprets from that bitmap when using to a toolbar button. I ask this because I have a program and I have one problem, if the first pixel(left-up corner) is black, when I compile the program it seem like the color black from all the toolbar buttons is transparent now.
Does someone encounter this problem before ???