Finding screens infos

[Davide Perini]

Hi all,
is there a way to get some infos on the connected monitors like the
numbers of connected monitors, the resolution they are using, the os
scaling in percentage?

Can you give me some tips on how to get this info please?

Thank you
Davide

[Tres Finocchiaro]

Davide,

This is a good start: https://java-native-access.github.io/jna/4.2.1/com/sun/jna/platform/win32/User32.html#EnumDisplayMonitors-com.sun.jna.platform.win32.WinDef.HDC-com.sun.jna.platform.win32.WinDef.RECT-com.sun.jna.platform.win32.WinUser.MONITORENUMPROC-com.sun.jna.platform.win32.WinDef.LPARAM-

The was recently a thread on the resolutions, which may helpful as well: https://groups.google.com/g/jna-users/c/xKIPZtlQ5p4/m/NPMvGRjiAAAJ

- Tres.Fin...@gmail.com

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[Tres Finocchiaro]

In addition, quoting Microsoft:

To retrieve information about all of the display monitors, use code like this:

EnumDisplayMonitors(NULL, NULL, MyInfoEnumProc, 0);  

Source: https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-enumdisplaymonitors

- Tres.Fin...@gmail.com

[Davide Perini]

Thank you Tres,
I have seen it but I can't understand what is the Screen #1, Scree #2 and Screen #3.

At least it doesn't match what Windows says.

I need to create something like this:


But the numbers must match the numbers that uses Windows.

Is there a workaround for the problem?

Thank you
Davide

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[Tres Finocchiaro]

David,

Perhaps this helps?

https://stackoverflow.com/a/22725002/3196753

This forums post claims that you can parse it from the Display name, but I'm not sure if that's accurate or not.

https://social.msdn.microsoft.com/Forums/en-US/048586a5-e04b-40d8-a2d6-4c903fbf9b1b/screenallscreens-sequence-not-matching-with-control-panel-display-setting?forum=winforms

e.g. szDevice = "\\.\DISPLAY1" ~= "1"

.. however according to this post, this is not correct, more calculations must be made:

https://social.msdn.microsoft.com/Forums/windowsdesktop/en-US/668e3cf9-4e00-4b40-a6f8-c7d2fc1afd39/how-can-i-retrieve-monitor-information?forum=windowsgeneraldevelopmentissues

The last link I find to be the most helpful as it has several people trying to solve this same problem. 

[Davide Perini]

THank you for the answer Tres,
I tried everything but the screen orders seems to be scrambled on some rigs.

I don't understand why.

Still looking on it.

Thank you very much, I really appreciate the time you spent answering,
in any case I learned something new from your answer :)

Davide

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