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SetDPI

This is a sample and simple C++ console project to change windows Scale and Layout aka DPI scaling from command line parameters. It can work on single and multi-monitor setup.

How to build (Windows 11)

  • Download VSCode.

  • Follow the tutorial here to set up VSCode to compile C++ using the Microsoft Visual C++ compiler.

  • In addition to the C/C++ extension, also install the C/C++ Extension Pack extension.

  • Close VSCode.

  • Open, and I cannot emphasize this enough, the Developer Command Prompt for VS 2022, which you can run by searching for it in the Start menu.

  • In that console window, type code ..

  • In the VSCode window that opens, Open Folder and navigate to wherever you cloned this repository.

  • Assure VSCode that I'm a perfectly aboveboard and trustworthy individual ;)

  • Hit Ctrl-Shift-B to build, and you should see the .exe file appear in the top-level directory of the repository.

How to use

It takes up to 2 parameters, first being the scale in percent. The second argument is the monitor index, which you get from windows display settings, if you click identify it shows you the index.

SetDPI.exe [DPI scale value] [monitor index]

If you have only one monitor or want only main monitor to change you can omit the monitor index.

To get the current scale of a monitor, replace the scale argument with get to print the current scaling. For automation with value only the scale is printed.

Examples

  • To set 2nd monitor to a scale value of 250
    • SetDPI.exe 250 2
  • To set main monitor to a scale value of 125
    • SetDPI.exe 125
  • To get the scale of the 2nd monitor
    • SetDPI.exe get 2 prints Current Resolution: 250
    • SetDPI.exe value 2 prints 250

Release

Get the release build and a sample AutoHotkey script with hotkey example from here https://github.com/imniko/SetDPI/releases/

Credits

The whole credits go to @lihas of this project, https://github.com/lihas/windows-DPI-scaling-sample it was not possible without his findings.

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