###### (This is the documentation for SDL3, which is under heavy development and the API is changing! [SDL2](https://wiki.libsdl.org/SDL2/) is the current stable version!) # SDL_InitSubSystem Compatibility function to initialize the SDL library. ## Syntax ```c int SDL_InitSubSystem(Uint32 flags); ``` ## Function Parameters | | | | ------------- | -------------------------------------------------------------------------------------- | | **flags** | any of the flags used by [SDL_Init](SDL_Init)(); see [SDL_Init](SDL_Init) for details. | ## Return Value Returns 0 on success or a negative error code on failure; call [SDL_GetError](SDL_GetError)() for more information. ## Remarks This function and [SDL_Init](SDL_Init)() are interchangeable. ## Version This function is available since SDL 3.0.0. ## Code Examples ```c++ /* Separating Joystick and Video initialization. */ SDL_Init(SDL_INIT_VIDEO); SDL_Window* window = SDL_CreateWindow("A Window", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, SDL_WINDOW_FULLSCREEN); SDL_Renderer* renderer = SDL_CreateRenderer(window, NULL, 0); /* Do Some Video stuff */ /* Initialize the joystick subsystem */ SDL_InitSubSystem(SDL_INIT_JOYSTICK); /* Do some stuff with video and joystick */ /* Shut them both down */ SDL_Quit(); ``` ## Related Functions * [SDL_Init](SDL_Init) * [SDL_Quit](SDL_Quit) * [SDL_QuitSubSystem](SDL_QuitSubSystem) ---- [CategoryAPI](CategoryAPI), [CategoryInit](CategoryInit)