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DMXQueryExtension - determine if DMX is available
#include <X11/extensions/dmxext.h> 
Bool DMXQueryExtension(Display *dpy,
                       int *event_basep,
                       int *error_basep);
DMXQueryExtension() determines if the DMX protocol extension
is available.  It will be available if the server is an Xdmx(1)
 server. 
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. 
DMXQueryVersion(3X)
,
 DMX(3X)
, Xdmx(1)
 
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