DPMSQueryExtension man page on FreeBSD

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DPMSQueryExtension(3)		  X FUNCTIONS		 DPMSQueryExtension(3)

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) Exten‐
       sion.  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	exten‐
		      sion  is not available, and the values of event_base and
		      error_base are undefined.

SEE ALSO
       DPMSGetVersion(3)

X Version 11			 libXext 1.1.1		 DPMSQueryExtension(3)
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