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CentOS 7.0 - man page for dpmscapable (centos section 3)

DPMSCapable(3)							    X FUNCTIONS 						    DPMSCapable(3)

NAME
DPMSCapable - returns the DPMS capability of the X server
SYNOPSIS
cc [ flag ... ] file ... -lXext [ library ... ] #include <X11/extensions/dpms.h> Bool DPMSCapable ( Display *display );
ARGUMENTS
display Specifies the connection to the X server
DESCRIPTION
The DPMSCapable function returns the Display Power Management Signaling (DPMS) capability of the X server, either TRUE (capable of DPMS) or FALSE (incapable of DPMS).
RETURN VALUES
True The DPMSCapable function returns True if the X server is capable of DPMS. False The DPMSCapable function returns True if the X server is incapable of DPMS. X Version 11 libXext 1.3.2 DPMSCapable(3)