Editing brightness

[Daspied]

Hello,

Is there a way to edit the brightness (or gamma) of an entire window / application, with out it affecting the other applications.

Thanks

[Gintaras]

If you make the window partially transparent, and place a white window behind it, the first window will be brighter. If the second window is black, the first window will be darker.
This makes Calculator 50% transparent.
Macro

Code:

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int w1=win("Calculator" "SciCalc")
Transparent w1 127
5
Transparent w1 256