SDL_AddHintCallback

Add a function to watch a particular hint.

Header File

void SDL_AddHintCallback(const char *name,
                         SDL_HintCallback callback,
                         void *userdata);

const char *	name	the hint to watch.
SDL_HintCallback	callback	An SDL_HintCallback function that will be called when the hint value changes.
void *	userdata	a pointer to pass to the callback function.

This function is available since SDL 2.0.0.