#include "SDL.h"
void SDL_WM_SetIcon(SDL_Surface *icon, Uint8 *mask);
Sets the icon for the display window. Win32 icons must be 32x32.
This function must be called before the first call to SDL_SetVideoMode.
It takes an icon surface, and a mask in MSB format.
If mask is NULL, the entire icon surface will be used as the icon.
SDL_WM_SetIcon(SDL_LoadBMP("icon.bmp"), NULL);
SDL_SetVideoMode, SDL_WM_SetCaption