Man page - sdl_getwindowid(3)

Packages contains this manual

Package: libsdl3-doc
apt-get install libsdl3-doc

Documentations in package:

SDL_GetWindowID - Get the numeric ID of a window.

Defined in SDL3/SDL_video.h

#include "SDL3/SDL.h"

SDL_WindowID SDL_GetWindowID(SDL_Window *window);

The numeric ID is what SDL_WindowEvent
references, and is necessary to map these events to specific SDL_Window

objects.

window

the window to query.

( SDL_WindowID ) Returns the ID of the window on success or 0 on failure; call SDL_GetError () for more information.

This function should only be called on the main thread.

This function is available since SDL 3.2.0.