# SDL_GetWindowSurfaceVSync

Get VSync for the window surface.

## Header File

Defined in [<SDL3/SDL_video.h>](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_video.h)

## Syntax

```c
bool SDL_GetWindowSurfaceVSync(SDL_Window *window, int *vsync);
```

## Function Parameters

|                            |            |                                                                                                                                                           |
| -------------------------- | ---------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [SDL_Window](SDL_Window) * | **window** | the window to query.                                                                                                                                      |
| int *                      | **vsync**  | an int filled with the current vertical refresh sync interval. See [SDL_SetWindowSurfaceVSync](SDL_SetWindowSurfaceVSync)() for the meaning of the value. |

## Return Value

(bool) Returns true on success or false on failure; call
[SDL_GetError](SDL_GetError)() for more information.

## Thread Safety

This function should only be called on the main thread.

## Version

This function is available since SDL 3.2.0.

## See Also

- [SDL_SetWindowSurfaceVSync](SDL_SetWindowSurfaceVSync)

----
[CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategoryVideo](CategoryVideo)

