[VisualStylesMode: Net11] DomainUpDown and NumericUpDown do not use the Windows accent color when focused with VisualStyleMode = NET11

[Olina-Zhang]

.NET version

.NET 11.0.100-preview.7.26365.114 + Private dlls built from Net11/Integration-2 branch of https://github.com/KlausLoeffelmann/winforms repo

Did it work in .NET Framework?

Yes

Did it work in any of the earlier releases of .NET Core or .NET 5+?

Not support, new feature

Issue description

When VisualStyleMode is set to NET11, TextBox correctly uses the Windows accent-colored focus indicator when focused.
However, DomainUpDown and NumericUpDown continue to display the traditional focus border instead of using the configured Windows accent color, resulting in inconsistent focus visuals across input controls.

TextBox:

DomainUpDown/NumericUpDown:

Steps to reproduce

1. In Windows Settings > Personalization > Colors, select a noticeable Accent color (e.g. Red).
2. Create a WinForms application targeting .NET 11.
3. Set the Form's VisualStyleMode to NET11.
4. Add a TextBox, DomainUpDown, and NumericUpDown to the Form.
5. Run the application.
6. Click each control (or use Tab) to give it focus to observe

[KlausLoeffelmann]

Will be most likely fixed in Integration-3.

[Olina-Zhang]

Tested the fix in .NET 11/Integration-3: #14768, it was fixed: