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(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)


Request that the window be made as large as possible.

Header File

Defined in <SDL3/SDL_video.h>


int SDL_MaximizeWindow(SDL_Window *window);

Function Parameters

window the window to maximize

Return Value

Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.


Non-resizable windows can't be maximized. The window must have the SDL_WINDOW_RESIZABLE flag set, or this will have no effect.

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

When the window state changes, an SDL_EVENT_WINDOW_MAXIMIZED event will be emitted. Note that, as this is just a request, the windowing system can deny the state change.

When maximizing a window, whether the constraints set via SDL_SetWindowMaximumSize() are honored depends on the policy of the window manager. Win32 and macOS enforce the constraints when maximizing, while X11 and Wayland window managers may vary.


This function is available since SDL 3.0.0.

See Also

CategoryAPI, CategoryAPIFunction, CategoryVideo

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