SDL windowfocus on top in sdl 1.2

I’m using sdl 1.2 for video display in Visual studio 2008.BY using SDL_SetVideoMode , SDL_CreateYUVOverlay,SDL_DisplayYUVOverlay functions to put video on screen.My query is how to put the screen focus on top of the screen in sdl 1.2? More specifically how to put the screen priority high like MFC function BringWindowOnTop.
my difficulty is when the video screen is displaying and that time if some other window is opening video screen is minimizing.
If the focus and screen is on top this scenario wont happen.But I’m unable to put the focus priority as Top.
If anyone have an idea about how to solve this problem please help me…

with regards