Provided by: libsdl3-doc_3.2.26+ds-2_all 

NAME
SDL_SetWindowParent - Set the window as a child of a parent window.
SYNOPSIS
#include <SDL3/SDL_video.h>
bool SDL_SetWindowParent(SDL_Window *window, SDL_Window *parent);
DESCRIPTION
If the window is already the child of an existing window, it will be reparented to the new owner. Setting
the parent window to NULL unparents the window and removes child window status.
If a parent window is hidden or destroyed, the operation will be recursively applied to child windows.
Child windows hidden with the parent that did not have their hidden status explicitly set will be
restored when the parent is shown.
Attempting to set the parent of a window that is currently in the modal state will fail. Use
SDL_SetWindowModal() to cancel the modal status before attempting to change the parent.
Popup windows cannot change parents and attempts to do so will fail.
Setting a parent window that is currently the sibling or descendent of the child window results in
undefined behavior.
FUNCTION PARAMETERS
window the window that should become the child of a parent.
parent the new parent window for the child window.
RETURN VALUE
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
SDL_SetWindowModal(3)
Simple Directmedia Layer SDL 3.2.26 SDL_SetWindowParent(3)