How to make only part of the window partially transparent? [WinSet]

[NorInd]

I know I can use the command WinSet, Transparent, 175, A to make the window transparent.

But it makes the whole window transparent.
How can I make only part of the window transparent?
eg: Make only the upper part transparent, while the lower part is not.

[BoBo]

https://www.autohotkey.com/docs/commands/WinSet.htm#ExRegion

[NorInd]

https://www.autohotkey.com/docs/commands/WinSet.htm#ExRegion

I know this Region command, (I am using this only as a temporary solution) but it makes the window (the part outside the Region) totally invisible -- ie: alpah = 0;
But how can I make that part only partially transparent -- ie: alpah = 175?

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//fix wording

How to make only part of the window transparent? [WinSet]
>>
How to make only part of the window partially transparent? [WinSet]

//fix wording

but it makes the window totally invisible
>>
but it makes the window (the part outside the Region) totally invisible

[BoBo]

Using 'WinSet, Transparent' beforehand/afterwards?

[NorInd]

Using 'WinSet, Transparent' beforehand/afterwards?

Em, I am not sure what you mean.
Do you mean somehow combine Transparent & Region?

Are you able to provide an example with codes?
Say, I want to set: the upper part of the window to alpha = 175, the lower part to be alpha = 135.

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The work around I am using is this, which doesnt set part of the window, but the whole window with a transparency.

Code: Select all

    WinSet, Transparent, 135, A
    xpos := 40
    ypos := 482
    width := 800
    height := 240
    WinSet, Region, %xpos%-%ypos% W%width% H%height%, ahk_exe notepad++.exe