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Windows: how to change the brightness of the monitor backlight

Since I used an external monitor with a laptop, when I need to change the brightness of the backlight, I have to press the buttons of the monitor to navigate its menu and adjust the brightness.
This is really a pain. This is too many button presses! When I used my built-in laptop monitor, it was as simple as assigning an Fn plus a combination.

Perhaps some of you might think that this cannot be changed programmatically. I thought that too. But I just found a control (GUI control) in my video card configuration that does just that. Thus, it proves that it can be changed programmatically.

But I can not find any tool or utility that does this. All I have found are tools that adjust gamma, brightness and contrast. But the brightness of the backlight is another matter.

Do any of you know how to programmatically configure this damn thing on Windows?

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4 answers

Try again. There is a SetMonitorBrightness function, but it is only available with Vista. There is also IOCTL_VIDEO_SET_DISPLAY_BRIGHTNESS , available with XP SP1. I could give this attempt on my laptop just out of curiosity.

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I know this question is about Windows, but if someone is looking for a Linux way to do this, you can run the "xbacklight" program, for example: "xbacklight -set 100" to set to 100% (full) brightness. The source code for this program can be used to insert it into the program.

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There are several tools that allow you to set the brightness of the backlight:

The latter uses a special library that they offer commercially and supports most of the popular programming languages ​​in Windows. http://www.nicomsoft.com/products/i2c/

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If you have an NVidia card with a control panel installed, you must have brightness control on the Adjust desktop color settings node.

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