Fix The nodes of TreeView not in dark mode when editing it

[Sathish-087]

Fixes #12042

Proposed changes

• Handle WM_CTLCOLOREDIT in TreeView.WndProc for the native in-place node label edit control.
• Handle WM_CTLCOLOREDIT in ListView.WndProc for the native in-place item label edit control to maintain consistent dark-mode behavior.
• Use the existing InitializeDCForWmCtlColor infrastructure to apply the correct foreground and background colors to the native edit control during label editing.

Customer Impact

• TreeView node text editing now correctly respects dark mode colors instead of displaying a light-themed edit box.
• ListView item label editing receives the same color handling, ensuring a consistent experience across editable controls.
• Improves visual consistency and usability when editing labels in dark-themed WinForms applications.

Regression?

• No

Risk

• Low. The change only affects the WM_CTLCOLOREDIT path for native label-edit controls and reuses the existing InitializeDCForWmCtlColor implementation already used throughout WinForms color initialization logic.

Screenshots

Before

TreeViewEditIssue.mp4

After

TreeViewEditFixDemo.mp4

Test methodology

• Verified that TVN_BEGINLABELEDITW creates a native edit control and that WM_CTLCOLOREDIT is raised by the edit control during painting.
• Confirmed that routing WM_CTLCOLOREDIT to InitializeDCForWmCtlColor correctly applies the control's ForeColor and BackColor.
• Tested label editing in both TreeView and ListView under dark mode and verified that text and background colors match the parent control.

Accessibility testing

• No accessibility regressions observed. The change only updates color initialization for the native label-edit control and does not modify accessibility properties, keyboard navigation, or UI Automation behavior.

Test environment(s)

• Windows 11
• .NET SDK: 11.0.100-preview.5.26302.115

Microsoft Reviewers: Open in CodeFlow