(This is the documentation for SDL3, which is the current stable version. SDL2 was the previous version!)

SDL_SetWindowBordered

Set the border state of a window.

Header File

Syntax

bool SDL_SetWindowBordered(SDL_Window *window, bool bordered);

Function Parameters

SDL_Window *	window	the window of which to change the border state.
bool	bordered	false to remove border, true to add border.

Return Value

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

Remarks

This will add or remove the window's SDL_WINDOW_BORDERLESS flag and add or remove the border from the actual window. This is a no-op if the window's border already matches the requested state.

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

Version

This function is available since SDL 3.1.3.