# SDL_SetWindowSize

Request that the size of a window's client area be set.

## 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_SetWindowSize(SDL_Window *window, int w, int h);
```

## Function Parameters

|                            |            |                                        |
| -------------------------- | ---------- | -------------------------------------- |
| [SDL_Window](SDL_Window) * | **window** | the window to change.                  |
| int                        | **w**      | the width of the window, must be > 0.  |
| int                        | **h**      | the height of the window, must be > 0. |

## Return Value

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

## Remarks

If the window is in a fullscreen or maximized state, this request has no
effect.

To change the exclusive fullscreen mode of a window, use
[SDL_SetWindowFullscreenMode](SDL_SetWindowFullscreenMode)().

On some windowing systems, this request is asynchronous and the new window
size may not have have been applied immediately upon the return of this
function. If an immediate change is required, call
[SDL_SyncWindow](SDL_SyncWindow)() to block until the changes have taken
effect.

When the window size changes, an
[SDL_EVENT_WINDOW_RESIZED](SDL_EVENT_WINDOW_RESIZED) event will be emitted
with the new window dimensions. Note that the new dimensions may not match
the exact size requested, as some windowing systems can restrict the window
size in certain scenarios (e.g. constraining the size of the content area
to remain within the usable desktop bounds). Additionally, as this is just
a request, it can be denied by the windowing system.

## 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_GetWindowSize](SDL_GetWindowSize)
- [SDL_SetWindowFullscreenMode](SDL_SetWindowFullscreenMode)
- [SDL_SyncWindow](SDL_SyncWindow)

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

