uses SDL;
procedure SDL_WM_SetIcon( icon : PSDL_Surface; mask : UInt8 );
Sets the icon for the display window.
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' ), nil );
SDL_SetVideoMode , SDL_WM_SetCaption