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.\" X Window System is a trademark of The Open Group.
.\" 
.TH DPMSQueryExtension __libmansuffix__ __xorgversion__ "X FUNCTIONS"
.SH NAME
DPMSQueryExtension \- queries the X server to determine the availability
of the DPMS Extension
.SH SYNOPSIS
.PP
.nf
\fBcc\fR [ \fIflag\fR \&.\&.\&. ] \fIfile\fR \&.\&.\&. -\fBlXext\fR [ \fIlibrary\fR \&.\&.\&. ]
\&#include <X11/extensions/dpms.h>
.HP
.B Bool DPMSQueryExtension
(
.br
      Display \fI*display\fP\^,
.br
      int \fI*event_base\fP\^,
.br
      int \fI*error_base\fP\^ 
);
.if n .ti +5n
.if t .ti +.5i
.SH ARGUMENTS
.TP
.I display
Specifies the connection to the X server
.TP
.I event_base
Specifies the return location for the assigned base event
.TP
.I error_base
Specifies the return location for the assigned base error
.SH DESCRIPTION
.LP
The 
.I 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
.I event_base
and 
.I error_base
are set to the base event and error numbers, respectively.  Otherwise, the 
return value is FALSE, and the 
values of
.I event_base
and 
.I error_base 
are undefined.
.SH "RETURN VALUES"
.TP 15
TRUE
The 
.I DPMSQueryExtension 
function returns TRUE if the extension is available, 
and
.I event_base
and 
.I error_base
are set to the base event number and base error number for the extension, 
respectively.
.TP 15
FALSE
The 
.I DPMSQueryExtension 
function returns FALSE if extension is not available, and the values of
.I event_base
and 
.I error_base 
are undefined.
.SH "SEE ALSO"
.BR DPMSGetVersion (__libmansuffix__)