NAME

       DPMSQueryExtension  -  queries  the  X  server  to  determine the availability of the DPMS
       Extension

SYNOPSIS

       cc [ flag ... ] file ... -lXext [ library ... ]
       #include <X11/extensions/dpms.h>

       Bool DPMSQueryExtension
              (
                    Display *display,
                    int *event_base,
                    int *error_base
              );

ARGUMENTS

       display
              Specifies the connection to the X server

       event_base
              Specifies the return location for the assigned base event

       error_base
              Specifies the return location for the assigned base error

DESCRIPTION

       The DPMSQueryExtension function queries the X server to determine the availability of  the
       Display  Power  Management  Signaling (DPMS) Extension.  If the extension is available, it
       returns TRUE, and the event_base and error_base are  set  to  the  base  event  and  error
       numbers, respectively.  Otherwise, the return value is FALSE, and the values of event_base
       and error_base are undefined.

RETURN VALUES

       TRUE           The DPMSQueryExtension function returns TRUE if the extension is available,
                      and  event_base  and  error_base  are set to the base event number and base
                      error number for the extension, respectively.

       FALSE          The  DPMSQueryExtension  function  returns  FALSE  if  extension   is   not
                      available, and the values of event_base and error_base are undefined.

SEE ALSO

       DPMSGetVersion(3)