DPMSGetVersion(3) returns the version of the DPMS extension implemented by

SYNOPSIS

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

Status DPMSGetVersion (
Display *display,
int *major_version,
int *minor_version );
     

ARGUMENTS

display
Specifies the connection to the X server
major_version
Specifies the return location for the extension major version
minor_version
Specifies the return location for the extension minor version

DESCRIPTION

The DPMSGetVersion function returns the version of the Display Power Management Signaling (DPMS) extension implemented by the X server. It returns a major and minor version number. The major version number will be incremented for protocol incompatible changes, and the minor version number will be incremented for small, upward compatible changes.

RETURN VALUES

TRUE
The DPMSGetVersion function returns TRUE when the extension is supported and values are returned.
FALSE
The DPMSGetVersion function returns FALSE when the extension is not supported.