man DMXQueryExtension (Fonctions bibliothèques) - determine if DMX is available
NAME
DMXQueryExtension - determine if DMX is available
SYNOPSIS
#include <X11/extensions/dmxext.h>
Bool DMXQueryExtension(Display *dpy,
int *event_basep,
int *error_basep);
DESCRIPTION
DMXQueryExtension() determines if the DMX protocol extension is available. It will be available if the server is an Xdmx(1) server.
RETURN VALUE
If the DMX protocol extension is available, event_basep and error_basep will be set to the event and error bases, respectively, and True will be returned. Otherwise, False will be returned.