[SDL] Removing the black background out of a surface?

[Leo M. Cabrera]

Hello everyone!
Hey, when you create a surface with SDL_CreateRGBSurface(), it gives you 
a black background...  If I blit my tank on top of that, it still shows 
the black on the back!

=<Code>=============
    this->vehicles[0].bmp = SDL_CreateRGBSurface(SDL_HWSURFACE, 96, 96, 
32, 0, 0, 0, 0);

    if (SDL_SetColorKey(this->vehicles[0].bmp, SDL_SRCCOLORKEY, 255) == 
-1) return false;

    if (SDL_SetAlpha(this->vehicles[0].bmp, SDL_SRCALPHA, 128) == -1) 
return false;
=</Code>============

How should it be?  Thanks!

-- 
~ Leo, M@$73r L3170, Sulfurik, Kixdemp, L-28C... Whatever you wanna call me.