Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_GetWindowID - Get the numeric ID of a window.
HEADER FILE
Defined in SDL3/SDL_video.h
SYNOPSIS
#include "SDL3/SDL.h" SDL_WindowID SDL_GetWindowID(SDL_Window *window);
DESCRIPTION
The numeric ID is what SDL_WindowEvent references, and is necessary to map these events to specific SDL_Window objects.
FUNCTION PARAMETERS
window the window to query.
RETURN VALUE
( SDL_WindowID ) Returns the ID of the window on success or 0 on failure; call SDL_GetError () for more information.
THREAD SAFETY
This function should only be called on the main thread.
AVAILABILITY
This function is available since SDL 3.2.0.
SEE ALSO
•(3), SDL_GetWindowFromID(3) Simple Directmedia Layer SDL 3.2.8 SDL_GetWindowID(3)