DPMSQueryExtension3x
Queries the x server to determine the availability of the dpms extension
Usage
cc [ flag ... ] file ... -lXext [ library ... ]
#include <X11/extensions/dpms.h>
Bool DPMSQueryExtension
(
Display *display,
int *event_base,
int *error_base
);
Arguments
display
|
Specifies the connection to the X server |
|---|---|
event_base
|
Specifies the return location for the assigned base event |
error_base
|
Specifies the return location for the assigned base error |
Overview
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.
Return values
- TRUE
-
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.
- FALSE
-
The DPMSQueryExtension function returns FALSE if extension is not available, and the values of event_base and error_base are undefined.