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Run your Qt 6 apps on Windows 7/8
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README.md

This is Qt 6.6.1 backport that runs on Windows 7 (what?). The repository contains patched source files from the qtbase module. Approach is based on this forum thread but better: many improvements amongst important fallbacks to default Qt 6 behaviour when running on newer Windows.

You can use our prebuild binaries (we used Visual C++ 2019 with OpenSSL 1.1.1k statically linked, see compile_win.pl script) or compile Qt yourself.

Known issues:

  • Scalled UI is somewhat too big for 125% scalling option set in Windows 7. Probably can be be tweaked with dpi settings (?)
  • QRhi using DirectX 11/12 is not ported

Qt 6.6 designer running on Windows 7:

image