Changing brightness of display (C#) -

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possible duplicate:
c# setting screen brightness windows 7

i searched online topics chanding brightness of display through c#.
part, got links change gamma in windows (here & here) , working fine me. wondering if correct way of reducing brightness or dimming display (does save power reducing brightness of monitor does?)

is way reduce brightness or there better way same? i'm on windows 7 (i forgot default gamma value of windows is?! somebody?)

contrast/brightness properties inside of physical monitor; not software. windows knows gamma. tools , guides find, secretly edit gamma, not same brightness/contrast.

but did find link: "how control ‘real’ brightness , contrast of monitors software"

this not technical explanation of how it's done, lists problems common 'tools' claim able it. instead demonstrates use of couple of programs communicate monitor. monitor video card, need support ddc protocol.

maybe can use ddc protocol roll own approach in c#. there might libraries already, if not; difficult implementation guess.


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