This function returns a read-only pointer to information about the video hardware.
IntPtr to SDL_VideoInfo struct
If this is called before SDL_SetVideoMode, the 'vfmt' member of the returned structure will contain the pixel format of the "best" video mode.
Binds to C-function call in SDL_video.h:
extern DECLSPEC const SDL_VideoInfo * SDLCALL SDL_GetVideoInfo(void)