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SetMonitorBrightness function

Applies to: desktop apps only

Sets a monitor's brightness value. Increasing the brightness value makes the display on the monitor brighter, and decreasing it makes the display dimmer.

Syntax

Copy

BOOL SetMonitorBrightness(
  __in  HANDLE hMonitor,
  __in  DWORD dwNewBrightness
);

Parameters

hMonitor [in]: Handle to a physical monitor. To get the monitor handle, call GetPhysicalMonitorsFromHMONITOR or GetPhysicalMonitorsFromIDirect3DDevice9.
dwNewBrightness [in]: Brightness value. To get the monitor's minimum and maximum brightness values, call GetMonitorBrightness.

Return value

If the function succeeds, the return value is TRUE. If the function fails, the return value is FALSE. To get extended error information, call GetLastError.

Remarks

If this function is supported, the GetMonitorCapabilities function returns the MC_CAPS_BRIGHTNESS flag.

This function takes about 50 milliseconds to return.

The brightness setting is a continuous monitor setting. For more information, see Using the High-Level Monitor Configuration Functions.

Requirements