###### (This is the legacy documentation for stable SDL2, the current stable version; [SDL3](https://wiki.libsdl.org/SDL3/) is the current development 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 In SDL2, this function and [SDL_Init](SDL_Init)() are interchangeable. ## Version This function is available since SDL 2.0.0. ## Related Functions * [SDL_Init](SDL_Init) * [SDL_Quit](SDL_Quit) * [SDL_QuitSubSystem](SDL_QuitSubSystem) ---- [CategoryAPI](CategoryAPI), [CategoryInit](CategoryInit)