Using VC how to acquire the power options screen brightness values of the progress bar?-CodePudding

Use DeviceIoControl (h, IOCTL_VIDEO_QUERY_DISPLAY_BRIGHTNESS, NULL, 0, (DISPLAY_BRIGHTNESS *) & amp; DisplayBrightness nOutBufferSize, & amp; NOutBufferSize, NULL) query the current Screen brightness values, the value of 7 is brightness; seven [10] 60 units, and doing will get [10, 70] of the 70 units, 10 units of the intensity of brightness is 10, will set a value of 10 brightness intensity when the power options Screen lightness of the progress bar cannot reach the bottom, if there is a way to fit or what is the way to obtain Screen lightness progress bar value??

CodePudding user response:

Set/get better display brightness with these two functions, brightness value 0-100

 BOOL GetMonitorBrightness (
__in HANDLE hMonitor, 
__out LPDWORD pdwMinimumBrightness, 
__out LPDWORD pdwCurrentBrightness, 
__out LPDWORD pdwMaximumBrightness 
); 

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

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