Changes to main branch to address #12042

[pcblues]

Fixes #12042 - TreeNode and ListItem not displaying in dark mode during editing, even though application is set to be in dark mode.

Proposed changes

If the application is in dark mode, capture the parent's windows message to identify the start of editing, and change the colour of the brush to match the parent's window color.

Customer Impact

Correction of incorrect color selection.

Regression?

• Yes / No

Risk

I tried to limit the impact of the change to only occurring when the application is in dark mode. I'm not sure of the impact, if any, on custom ListView subitems, or custom-drawn TreeNodes.

Screenshots

Before

After

Test methodology

I used the test application provided to highlight the bug in the ticket to test the new behaviour.

Accessibility testing

Test environment(s)

Microsoft Reviewers: Open in CodeFlow

Microsoft Reviewers: Open in CodeFlow

[codecov]

Codecov Report

Attention: Patch coverage is 21.42857% with 22 lines in your changes missing coverage. Please review.

Project coverage is 76.02900%. Comparing base (2321dc8) to head (739a255).
Report is 4 commits behind head on main.

Additional details and impacted files

@@                 Coverage Diff                 @@
##                main      #12674         +/-   ##
===================================================
- Coverage   76.03358%   76.02900%   -0.00459%     
===================================================
  Files           3180        3181          +1     
  Lines         639670      639698         +28     
  Branches       47215       47217          +2     
===================================================
- Hits          486364      486356          -8     
- Misses        149791      149822         +31     
- Partials        3515        3520          +5     

Flag	Coverage Δ
Debug	76.02900% <21.42857%> (-0.00459%)	⬇️
integration	18.16885% <0.00000%> (-0.00568%)	⬇️
production	49.81813% <21.42857%> (-0.00878%)	⬇️
test	97.02915% <ø> (+0.00083%)	⬆️
unit	47.04530% <21.42857%> (+0.02242%)	⬆️

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[pcblues]

Hi there. I'm not sure what to do with the codecov report. For perspective, I have been a developer for 20 odd years, but haven't done changes through github for MS before. Cheers.

[pcblues]

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[pcblues]

This is my first PR for MS. I didn't really understand what was happening with the accessibility testing software.