cc [ flag ... ] file ... -lXext [ library ... ] #include <X11/extensions/dpms.h> Status DPMSForceLevel ( Display *display, CARD16 level );Argumentsdisplay Specifies the connection to the X server level Specifies the level to force power to DescriptionThe DPMSForceLevel function forces a DPMS capable display into the specified power level. The level must be one of following four states: DPMSModeOn, DPMSModeStandby, DPMSModeSuspend, or DPMSModeOff. Values other than these will result in a BadValue error. If DPMS is disabled on the display, trying to set the power level on the display will result in a BadMatch protocol error. Return ValuesTRUE The DPMSForceLevel function always returns TRUE. ErrorsBadValue A level other than DPMSModeOn, DPMSModeStandby, DPMSModeSuspend, or DPMSModeOff was specified. BadMatch DPMS is disabled on the specified display. See AlsoDPMSCapable(3), DPMSInfo(3), DPMSGetTimeouts(3), DPMSSetTimeouts(3)