SDL_SetWindowResizable - Man Page

#include <SDL3/SDL_video.h>

bool SDL_SetWindowResizable(SDL_Window *window, bool resizable);

This will add or remove the window's SDL_WINDOW_RESIZABLE flag and allow/disallow user resizing of the window. This is a no-op if the window's resizable state already matches the requested state.

You can't change the resizable state of a fullscreen window.

window

the window of which to change the resizable state.

resizable

true to allow resizing, false to disallow.

for more information.

This function should only be called on the main thread.

This function is available since SDL 3.2.0.

SDL_GetWindowFlags(3)