SDL_WINDOWPOS_UNDEFINED_DISPLAY - Man Page

Used to indicate that you don't care what the window position is.

Header File

Defined in SDL3/SDL_video.h

#include "SDL3/SDL.h"

#define SDL_WINDOWPOS_UNDEFINED_DISPLAY(X)  (SDL_WINDOWPOS_UNDEFINED_MASK|(X))

If you _really_ don't care,

SDL_WINDOWPOS_UNDEFINED
is the same, but always uses the primary display instead of specifying one.

This macro is available since SDL 3.2.0.

SDL 3.2.2 Simple Directmedia Layer SDL3 FUNCTIONS