High DPI support (per monitor v2)

[fowl2]

Seems to mostly work, but more of a MVP/POC.

Followed the instructions here: High DPI support in Windows Forms

On my Windows 10 22H2 machine, I can drag a window from my main display at 100% to another at 125% without it becoming blurry.

Also upgrades to .NET 4.8 - targeting .NET 4.7 didn't seem to scale tool strips correctly. This is only needed for the main project, but it would probably make sense for the others too?

[MscrmTools]

Thank you for helping on this one!
If I read it correctly, it seems each and every form must be set to scale to DPI?

[fowl2]

I did a few experiments (that I really should've recorded the outcome of) and AutoScaleMode.Dpi is what seemed to give the best results. IIRC I basically did a find and replace instead of opening each form in the designer - that may give better results.

[Stitti]

Also works well for me on my Windows 10 computer with one screen at 100% and the second at 125%.
If some projects are already running on .Net Framework 4.8 anyway, I agree that we might as well upgrade them all

[rnwood]

Voting for this issue as I believe it affects one of the controls in my plugin (from an external dependency).

On a normal DPI monitor, the font size is roughly 2x size of same on a high DPI monitor. The rest of the standard winforms controls render correctly.

Edit: This seems like a good test case for this PR. I will rebase it and test then feedback here.

[rnwood]

As above, I tested this again to see if it would fix my particular issue.

There's still a bit of work to do here if this is to be merged. I rebased this and tested it (also did another replace on the per form DPI settings as above) and it's a bit of a mess with the layout broken in a few places of the main form (NewForm). Possibly wider as I didn't go beyond in detail.

Crucially for me, it did not resolve the issue in the ConEmu control I am using. I guess it has client rendering.

So removing my vote from this issue. Sorry for the noise.