DPMSQueryExtension(3) X FUNCTIONS DPMSQueryExtension(3)

DPMSQueryExtension - queries the X server to determine the availability of the DPMS Extension

cc [ flag ... ] file ... -lXext [ library ... ]
#include <X11/extensions/dpms.h>
Bool DPMSQueryExtension
(
      Display *display,
      int *event_base,
      int *error_base
);

Specifies the connection to the X server
Specifies the return location for the assigned base event
Specifies the return location for the assigned base error

The 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 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.

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.
The DPMSQueryExtension function returns FALSE if extension is not available, and the values of event_base and error_base are undefined.

DPMSGetVersion(3)

libXext 1.3.6 X Version 11