DPMSGetVersion(3) X FUNCTIONS DPMSGetVersion(3)

DPMSGetVersion - returns the version of the DPMS extension implemented by the X server

cc [ flag ... ] file ... -lXext [ library ... ]
#include <X11/extensions/dpms.h>
Status DPMSGetVersion
(
      Display *display,
      int *major_version,
      int *minor_version
);

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

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.

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

DPMSCapable(3), DPMSQueryExtension(3)

libXext 1.3.6 X Version 11