man DMXForceWindowCreation (Fonctions bibliothèques) - force immediate back-end window creation
NAME
DMXForceWindowCreation - force immediate back-end window creation
SYNOPSIS
#include <X11/extensions/dmxext.h>
Bool DMXForceWindowCreation(Display *dpy,
Window window);
DESCRIPTION
When using the lazy window creation optimization, windows are not created on the back-end X servers until they are required. DMXForceWindowCreation() forces the immediate creation of the window requested.
RETURN VALUE
DMXForceWindowCreation() returns True unless there is a protocol error. DMXForceWindwoCreation() can generate BadWindow errors.