Thank Thomas,

I understand that Ed's solution is the best. No more words about it.

What I want to do ???
Maybe I can't explaint it because my english is very poor, but i'll try.
Take a look to the Internet explorer toolbar. Look the Forward button, it's disabled. It look with as disabled with a color schema of the toolbar.
Now, go to your screen properties (Control Panel) and change the color schema of your windows (select green for the 3D Objects item) and press Apply.
Now, take a look to the Forward button in the IE. It's remaind disabled but with different color schema.

Understand??? I can't create a bitmap for each color combination of each images of my application.

Thanks in advance for your time.