Make win32/perlexe high DPI aware

[clin1234]

On Windows 11 with a sufficiently high resolution and scaling not set to 100% (ie. 2560x1440 with 125% scaling), GUI apps that aren't high DPI aware will have rather blurry text. Not sure if this is really needed for GUI-based Perl applications, but given the presence of "Microsoft.Windows.Common-Controls" as a dependent assembly, better safe than sorry.

• This set of changes does not require a perldelta entry.

[tonycoz]

I don't think we want this.

If perl code uses Tk which I don't believe is DPI aware (or some other toolkit) setting this unconditionally is going to result in tiny UI elements on hidpi displays.

If a toolkit (or direct Win32 API process) wants hidpi there are APIs to control that.

I think @xenu would know better than I do though.

[xenu]

If perl code uses Tk which I don't believe is DPI aware (or some other toolkit) setting this unconditionally is going to result in tiny UI elements on hidpi displays.

Yeah, for many applications it would be a breaking change, much more breaking than enabling common controls styling was. Per-monitor scaling is especially problematic, as it requires the application to handle DPI change events.

If a toolkit (or direct Win32 API process) wants hidpi there are APIs to control that.

Right, and for example, GTK calls SetProcessDpiAwarenessContext automatically on initialisation.