>>When you say "not clear" do you mean "not transparent" or that the image is not displayed correctly?
>>
>>If the former, make sure the region you don't want displayed is white and verify that BackStyle = 0.
>>
>
>What if I need the color of white...? Isn't there a property that I can change the "transparent color" value from white to a different color?

No, you can't change that. But, white being transparent only applies to BMP's and with them, just create a mask (.msk file) in black and white with black where you want opaque and white where you want transparent.