ONLY FOR TESTING: Integration-4 for the new .NET 11 API by KlausLoeffelmann · Pull Request #14792 · dotnet/winforms

KlausLoeffelmann · 2026-07-21T08:55:52Z

This branch is for integration testing only and must not be merged.

Component branches: Net11Api_00 through Net11Api_05 (Net11Api_05_VisualStylesMode is the source of truth for the VisualStyles work), plus the modern ComboBox refinements from Net11/VisualStylesMode-Fixes.
SystemVisualSettings proposal: KlausLoeffelmann#14

It combines the independently reviewed Net11 API branches B00 through B05 and adds the
cross-feature composition for:

SystemVisualSettings
VisualStylesMode change-impact dispatch (now including VisualStylesModeChangeImpact.Recreate)
High Contrast routing
accent-aware rendering
client-area animation policy
TextBox focus metrics and text scale
the high-resolution animation pacer

Additional modern ComboBox work in Integration-4

Relative to Integration-3, this branch adds the modern ComboBox chrome/interaction fixes:

The modern field is unified over the themed drop-down button (WM_NCCALCSIZE), so the button no longer renders as a separate block outside the rounded field.
The drop-down button is clickable again: WM_NCHITTEST returns HTCLIENT over the expanded client and a press/release hit-test drives DroppedDown.
The modern paint path is double-buffered, removing the hand-drawn adorner flicker.
The drop-down button is widened and the edit child is inset so it no longer paints over the rounded-corner arcs.
Switching VisualStylesMode across the modern/classic boundary now recreates the handle (via the new VisualStylesModeChangeImpact.Recreate), so classic behaves exactly as before and a fresh modern handle captures a clean baseline. WM_NCCALCSIZE is gated off for ComboBoxStyle.Simple.

Fixes #14773

The PR remains a draft validation surface for the complete .NET 11 API set.

Microsoft Reviewers: Open in CodeFlow

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 27022e2a-9eb8-4f58-9bfa-e79ca0d6c559

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Hand-author the IUISettings3 / UIColor / UIColorType WinRT ABI types and generate the RoActivateInstance / WindowsCreateString / WindowsDeleteString / IInspectable / HSTRING Win32 bindings via CsWin32. The WinRT ABI types are excluded from the .NET Framework build, which does not consume them. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Expose the user's current Windows accent color by activating the Windows.UI.ViewManagement.UISettings runtime component and reading UIColorType.Accent. When no accent color is set, Windows returns an OS-defined default, so the method always yields a usable color. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Use event subscriptions as the opt-in for text-size notifications and remove the redundant awareness API surface. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 40d0f0f7-a584-4167-9187-9d529b7c70f8

Wrap the Form event remark in a paragraph and remove the redundant nullable handler initialization reported by the Arcade analyzers. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 40d0f0f7-a584-4167-9187-9d529b7c70f8

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 27022e2a-9eb8-4f58-9bfa-e79ca0d6c559

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 20883488-cf1e-4ad3-a681-0724e9f16777

…ce API.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Implements suspend painting and relocation scopes, deferred child positioning, and form appearance mode infrastructure for .NET 11. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

…rface Splits DeferLocationChange out of this branch entirely (postponed pending an anchor-layout-engine integration fix; tracked separately in #12) and reworks ISupportSuspendPainting / ISupportSuspendRelocation on Control to match the final API shape agreed in dotnet#14585: - Control implements ISupportSuspendPainting/ISupportSuspendRelocation via explicit interface implementation instead of public virtual methods, so the manual Begin/End pair does not become the primary IntelliSense surface on every Control-derived type. Protected virtual BeginSuspendPaintingCore() / EndSuspendPaintingCore() / BeginSuspendRelocationCore() / EndSuspendRelocationCore() are the new override points. - ListView, ListBox, ComboBox, TreeView, RichTextBox override the ...Core() hooks instead of the old public virtual methods, still routing through their existing BeginUpdate/EndUpdate. - SuspendPaintingScope and SuspendRelocationScope change from readonly ref struct to sealed class : IDisposable, so the scope can span an await in an asynchronous UI event handler (a ref struct cannot be hoisted into an async state machine - this was the flagship usage scenario in the original API proposal, and it did not compile against the ref struct version). Dispose is idempotent. - Deletes DeferLocationChangeScope.cs and the Control.DeferLocationChange overloads entirely. - Updates/removes tests accordingly; updates PublicAPI.Unshipped.txt. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

…inel Matches the final API shape agreed in dotnet#14585: - FormAppearanceMode -> FormRevealMode, adding Inherit = -1 as the ambient sentinel (Classic stays the CLR default value 0, matching the RightToLeft.Inherit / VisualStylesMode.Inherit precedent for ambient enums - the sentinel is a distinct value, not the zero value, so default(FormRevealMode) stays conservative). - Form.FormRevealMode is now a real public virtual, PropertyStore-backed, [AmbientValue(Inherit)] property (previously there was no per-Form property at all - only the flat, process-wide Application.FormAppearanceMode existed). This lets a form such as a splash screen opt itself out of deferred reveal without touching the process-wide default. Resolution is flat (Form only, no Control-parent-chain): DWM cloaking only ever applies to top-level, non-MDI-child windows, so there is no hierarchy to walk, unlike VisualStylesMode's genuine control-nesting cascade. - Application.FormAppearanceMode / SetFormAppearanceMode are replaced by three members: DefaultFormRevealMode (get; may return the unresolved Inherit sentinel, mirroring ColorMode returning the unresolved System value), SetDefaultFormRevealMode (freely reassignable, unlike the write-once SetDefaultVisualStylesMode - the effective default is derived in part from ColorMode/IsDarkModeEnabled, which are themselves mutable for the life of the process), and IsFormRevealDeferred (bool; the fully resolved answer: Deferred, or Inherit + IsDarkModeEnabled). This also fixes a compatibility problem in the original design: the old default was unconditionally Deferred whenever SetFormAppearanceMode was never called, an opt-out behavior change for every existing app; tying the Inherit resolution to dark mode means an app that never touches SystemColorMode sees no behavior change, while the scenario the feature exists for (dark-mode startup flash) is fixed by default. - ShouldUseDeferredAppearanceCloak now reads the resolved Form.FormRevealMode instead of the old flat Application-only check, so a per-Form override is actually honored. - Adds SR.resx/xlf entries for the new property's designer description. - Updates/adds tests; updates PublicAPI.Unshipped.txt. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Adds Microsoft.VisualBasic.ApplicationServices.ApplyApplicationDefaultsEventArgs.FormRevealMode, following the exact same pattern already established for ColorMode and HighDpiMode in that class, per dotnet#14585's API Proposal. WindowsFormsApplicationBase now carries a _formRevealMode shadow field (defaulting to FormRevealMode.Classic, matching the existing conservative default for _colorMode) and a protected FormRevealMode property, feeds it into the ApplyApplicationDefaultsEventArgs constructor alongside MinimumSplashScreenDisplayTime/HighDpiMode/ColorMode, reads back whatever the ApplyApplicationDefaults event handler set, and calls Application.SetDefaultFormRevealMode(_formRevealMode) at the end of OnInitialize alongside the existing Application.SetColorMode(_colorMode) call. This completes work anticipated but never finished in an earlier .NET 9 Visual Styles attempt at this same VB Application Framework extension point (OnInitialize already carried a comment claiming "We feed the defaults for HighDpiMode, ColorMode, VisualStylesMode to the EventArgs", but only HighDpiMode/ColorMode were ever actually wired up). Updates PublicAPI.Unshipped.txt for Microsoft.VisualBasic.Forms. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 20883488-cf1e-4ad3-a681-0724e9f16777

Remove the risky relocation API and add controlled layout traversal to painting scopes. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 9c3dc32b-7202-48c4-b0c7-f40a0a681ee2

…ng, and test cancellation/nullable guidance - building-code: add a top-level TENET to build the solution only with build.cmd (CI parity for PublicAPI/analyzer enforcement and -warnAsError); a plain dotnet build is inner-loop only. - new-control-api: new public/protected overrides must be tracked in PublicAPI.Unshipped.txt with the override prefix; note CS0114 (new keyword) and CS1574 (no cref to cross-assembly internal types). - control-api-tests: async tests must pass CancellationToken (TestContext.Current.CancellationToken, CA2016/xUnit1051) and respect the #nullable context (CS8632). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Refactor KioskModeManager component and introduce WakeUp-Events incl.. new WakeUpEventArgs.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 20883488-cf1e-4ad3-a681-0724e9f16777

…n Button and CheckBox toggle renderers Introduces the (non-experimental) Visual Styles versioning API and the first modern renderers gated behind it: - VisualStylesMode enum (Classic/Disabled/Net11/Latest); ambient Control.VisualStylesMode (+event/On-methods); Application.DefaultVisualStylesMode/SetDefaultVisualStylesMode; Appearance.ToggleSwitch; VB framework APIs. - HighPrecisionTimer (internal, Primitives) as the animation frame trigger, with tests. - AnimationManager/AnimatedControlRenderer driven by HighPrecisionTimer. - Conservative dark-mode Standard button (owner-drawn, reachable) + modern WinUI-style Button renderer. - CheckBox Appearance.ToggleSwitch modern toggle switch (animated, flicker-free). - WinformsControlsTest VisualStylesButtons exploratory harness; unit tests. Verified CI-clean with build.cmd: System.Windows.Forms, Microsoft.VisualBasic.Forms and Primitives build with no analyzer/PublicAPI/style errors (the only remaining failure is the pre-existing BuildAssist/AxHosts step, which is an environment limitation unrelated to these changes). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Base ShouldSerializeVisualStylesMode on the raw PropertyStore entry so Inherit emits no CodeDOM while explicit values round-trip through designer serialization. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 24d81626-c337-40c8-a515-393ee8e9827d

Move affected property contracts into partial declarations and add adaptive-layout guidance for metric growth, fixed-bounds editors, GroupBox content geometry, and aligned TextBox/ComboBox rows. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 24d81626-c337-40c8-a515-393ee8e9827d

Apply native selection-field height overrides only while modern metrics are active, or while restoring a field that previously used them, so classic owner-drawn item bounds remain unchanged. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 24d81626-c337-40c8-a515-393ee8e9827d

Assert the fixed non-owner-drawn mouse-over geometry instead of retaining the previous unsupported-adapter exception expectation. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 24d81626-c337-40c8-a515-393ee8e9827d

Render Standard as a borderless rectangular surface, use an accent outline for Flat and an accent header for Popup, and select real installed Semibold faces without mutating ambient fonts. Align caption and content metrics with Padding and preserve the existing visual-settings tracker cleanup. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 24d81626-c337-40c8-a515-393ee8e9827d

Reactivate designer serialization for the shipped Padding property, add a one-pixel framework inset, render rounded Standard and Popup frames plus a square Flat frame, and keep native edit/list content aligned across DPI, style, and layout changes. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 24d81626-c337-40c8-a515-393ee8e9827d

Accept the native System-style handle recreation's platform-dependent zero-or-one invalidation while retaining exact expectations for owner-drawn styles. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 24d81626-c337-40c8-a515-393ee8e9827d

Reintroduce the consolidated accessibility text-scale helper dropped during Integration-3 replay so SystemVisualSettingsTracker and font scaling share one registry implementation. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 24d81626-c337-40c8-a515-393ee8e9827d

ShouldUseDeferredAppearanceCloak() gated the DWM cloak on Visible == true, but it is only evaluated from OnHandleCreated, where a top-level form's window is still hidden (WS_VISIBLE is cleared from the create params and the show is deferred). The Visible state bit is not set until WM_SHOWWINDOW is processed, so the guard was always false, the cloak never engaged, and the window was shown uncloaked - still producing the default-background flash the mode is meant to prevent. Remove the Visible term so the already-hidden window is cloaked at handle creation. This covers Show, ShowDialog (which creates the handle via CreateControl before showing) and handle recreation. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

… button, no flicker, classic-safe) Squashed delta from Net11/VisualStylesMode-Fixes, applied on top of the Integration-3 result to produce Integration-4. Mirrors the same squash landed on the Net11Api_05_VisualStylesMode source-of-truth base. Includes: - Ambient visual-styles layout fix and the modern ComboBox renderer refactor (per-handle baseline, absolute target state, idempotent applier). - Modern ComboBox: WM_NCCALCSIZE unifies the field over the drop-down button; WM_NCHITTEST->HTCLIENT plus a press/release hit-test opens the list on a button click; double-buffered paint removes adorner flicker; wider button and edit window inset so the edit child clears the rounded arcs. - New Control.VisualStylesModeChangeImpact.Recreate: ComboBox returns it when crossing the modern/classic boundary so the handle is recreated and classic behaves exactly as before. WM_NCCALCSIZE gated off for Simple combos. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 64d20bbb-13df-4e59-8bcc-c307909b03f8

The modern (Net11+) UpDownBase content inset (ModernContentInset) used a flat 1px border-thickness term, so its edit and side-by-side buttons sat one pixel tighter inside the frame than a modern TextBoxBase (which uses the per-border-style border padding from ModernControlVisualStyles.GetFieldPadding). Switch to the same per-border-style constants so the internal padding matches: Fixed3D 3->4, None 2->3, FixedSingle unchanged at 3. Also document every metric in ModernControlVisualStyles with an XML summary, and update the UpDownBase modern-geometry tests to the new default (Fixed3D) inset of 4. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

LeafShi1 · 2026-07-22T02:42:18Z

+///  Provides data for a <see cref="Application.SystemVisualSettingsChanged"/> or
+///  <see cref="Control.SystemVisualSettingsChanged"/> event.
+/// </summary>
+public class SystemVisualSettingsChangedEventArgs : EventArgs


This should be sealed, It's an immutable DTO with an internal ctor (only the framework raises it), no virtual members, and no type hierarchy., there's no reason to allow inheritance. Also, unsealed→sealed is a breaking change later, while sealed→unsealed is not, so sealing now is the safe default

LeafShi1 · 2026-07-22T02:46:32Z

+///   own state to honor the user's Windows personalization and accessibility preferences.
+///  </para>
+/// </remarks>
+public sealed class SystemVisualSettings


Minor: SystemVisualSettings.cs currently holds a few public types — might be worth splitting the enum and the EventArgs into their own files to match the usual one-type-per-file convention

LeafShi1 · 2026-07-22T03:13:35Z

+///  <see cref="Application.SystemVisualSettingsChanged"/>.
+/// </param>
+/// <param name="e">The event data.</param>
+public delegate void SystemVisualSettingsChangedEventHandler(object? sender, SystemVisualSettingsChangedEventArgs e);


Could we use the built-in EventHandler<SystemVisualSettingsChangedEventArgs> instead of the custom SystemVisualSettingsChangedEventHandler delegate? The signature is identical (object? sender, SystemVisualSettingsChangedEventArgs e) , so there's no behavior change — it just saves us from adding a new permanent public type, and matches the current guidance to prefer EventHandler<TEventArgs> for new events.

API Review board final naming: the animation category flag is renamed from Animations to ClientAreaAnimations to match its underlying SystemVisualSettings.ClientAreaAnimationEnabled source. Value (1 << 3) unchanged. Updates the tracker, PublicAPI.Unshipped.txt, and tests. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 64d20bbb-13df-4e59-8bcc-c307909b03f8

Flicker-free UI mutation API: - Rename LayoutSuspendTraversal members for clarity and redefine semantics: None -> TargetOnly (0), TopLevelOnly -> TargetAndChildren (1, new: target plus immediate children), Traverse -> TargetAndDescendants (2). The painting-only (no layout suspension) case is now served solely by the parameterless SuspendPainting overload. - Make SuspendPaintingScope internal; the three ControlMutationExtensions .SuspendPainting overloads now return IDisposable. The await-safe / idempotent guidance moves to the public extension-method docs so it stays discoverable. - Document that Control implements ISupportSuspendPainting explicitly (callers use the IDisposable scope; overriders use Begin/EndSuspendPaintingCore). FormRevealMode: - Add the FormRevealModeChanged event and protected virtual OnFormRevealModeChanged, raised from the setter when the effective value changes. Updates PublicAPI.Unshipped.txt, SR.resx, and ControlTests.Methods.cs (including a new TargetAndChildren test). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 64d20bbb-13df-4e59-8bcc-c307909b03f8

Integration-4 also merges the VisualStyles slice (branch 05), whose AnimatedControlRenderer and associated tests consume the renamed enum member. Update those references so the integration compiles. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 64d20bbb-13df-4e59-8bcc-c307909b03f8

Generated by the build after adding the FormRevealModeChanged event description to SR.resx. Keeps the localized .xlf files in sync with the neutral resources. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 64d20bbb-13df-4e59-8bcc-c307909b03f8

Per follow-up review: the parameterless SuspendPainting overload already covers the painting-only case, but keeping an explicit None = 0 restores the intuitive default (no layout suspension) and avoids default(enum) silently suspending. TargetAndChildren is removed because the distinction from TargetOnly was subtle and confusing (a container's SuspendLayout already holds its children's layout). Final enum: None = 0, TargetOnly = 1, TargetAndDescendants = 2. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 64d20bbb-13df-4e59-8bcc-c307909b03f8

…rst paint Deferred reveal cloaked the form at OnHandleCreated and uncloaked on the form's own first WM_PAINT. That paint fires before the child controls - separate child windows - paint their first frame, so the window was revealed mid-paint and the tail of the startup flash (controls popping in) was still visible. Reveal only after the whole control tree has painted its first frame: - Add Form.RevealDeferredAppearance(): force a synchronous full-tree paint of the still-cloaked window (RedrawWindow RDW_INVALIDATE|RDW_ERASE|RDW_ALLCHILDREN| RDW_UPDATENOW), then uncloak, so the finished frame appears at once. It is a no-op once revealed / never cloaked, and guarded against re-entrancy since RDW_UPDATENOW dispatches WM_PAINT synchronously. - Trigger it from OnShown (CallShownEvent) as the primary, guaranteed one-shot point that runs before the first natural WM_PAINT, and keep the WM_PAINT hook as an idempotent fallback so the window can never be revealed mid-paint or stay stuck cloaked. Adds a safety-invariant test: a shown Deferred form must not remain cloaked. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 64d20bbb-13df-4e59-8bcc-c307909b03f8

SimonZhao888 · 2026-07-23T06:19:20Z

+    {
+        _threadId = Environment.CurrentManagedThreadId;
+        _threadExitHandler = OnThreadExit;
+        _timerRegistration = HighPrecisionTimer.Register(OnFrameTickAsync);


The constructor registers _timerRegistration, but it's not released after the last renderer is removed in UnregisterAnimationRenderer/Suspend. Once the manager is initialized, the HighPrecisionTimer registration persists, causing the UI thread to idle for an extended period until the thread exits, a clear example of idle overhead regression. Recommendation: Release/pause timer registration when _renderer becomes null; then lazily resume initialization the timer the next time a renderer is available.

SimonZhao888 · 2026-07-23T08:21:24Z

+            metrics,
+            textSize);
+
+        graphics.Clear(Control.BackColor);


AnimatedToggleSwitchRenderer.RenderControl currently clears with graphics.Clear(Control.BackColor). This bypasses the normal WinForms background pipeline (parent background, transparent background, background image/custom-painted parent), which can cause visual regressions on complex backgrounds.
Please switch to the standard WinForms background painting path (e.g., Control.PaintBackground(...) with PaintEventArgs and ClientRectangle) instead of direct Clear. That preserves both:

parent/transparent background semantics, and

proper BackColor blending behavior (including semi-transparent colors).

Suggested modifications:

using PaintEventArgs paintEventArgs = new(graphics, Control.ClientRectangle); Control.PaintBackground(paintEventArgs, Control.ClientRectangle);

Issue link: #14807

KlausLoeffelmann and others added 30 commits July 18, 2026 01:26

Centralize feature prompt documents

cb8e6bb

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 27022e2a-9eb8-4f58-9bfa-e79ca0d6c559

Add feature promp,

ba4b052

Factor system text scale lookup

904f907

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add system text size APIs

e8ccfcc

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add system text size tests

ea2837f

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Simplify system text size notifications

79a1bd1

Use event subscriptions as the opt-in for text-size notifications and remove the redundant awareness API surface. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 40d0f0f7-a584-4167-9187-9d529b7c70f8

Add system visual settings snapshot

a3b023e

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 27022e2a-9eb8-4f58-9bfa-e79ca0d6c559

Add TreeView.NodeLeading API

6f95d46

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add TreeView.NodeLeading tests

7a0f1e8

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Cover NodeLeading DPI resynchronization

df6eb15

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 20883488-cf1e-4ad3-a681-0724e9f16777

Add the prompts for the new Suspend-Positioning-Painting-Form-Apearan…

39ce1d7

…ce API.

Add flicker-free mutation API proposal prompt

f7ebead

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add flicker-free UI mutation APIs

efb62e0

Implements suspend painting and relocation scopes, deferred child positioning, and form appearance mode infrastructure for .NET 11. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add tests for flicker-free mutation APIs

f0b430d

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Fix FormRevealMode public API tracking

c664e84

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 20883488-cf1e-4ad3-a681-0724e9f16777

Preserve painting suspension across handles

24c81cd

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 20883488-cf1e-4ad3-a681-0724e9f16777

Add layout-aware painting suspension

6a94824

Remove the risky relocation API and add controlled layout traversal to painting scopes. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 9c3dc32b-7202-48c4-b0c7-f40a0a681ee2

Move component code files to component folder.

b50d6dc

Introduce KioskModeManager component.

614fcf9

* Refactor KioskModeManager component and introduce WakeUp-Events incl.. new WakeUpEventArgs.

Expand KioskModeManager tests.

48f3255

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Harden KioskModeManager lifecycle behavior

eaacd24

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 20883488-cf1e-4ad3-a681-0724e9f16777

Fix minor test issue.

c3457fc

KlausLoeffelmann and others added 10 commits July 19, 2026 23:45

dotnet-policy-service Bot assigned KlausLoeffelmann Jul 21, 2026

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ToolStripTextBox renders incorrectly when hosted in MenuStrip #14793

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ComboBox with DropDownStyle.Simple renders incorrectly and displays an unexpected vertical scrollbar #14795

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dotnet-policy-service Bot added the draft draft PR label Jul 21, 2026

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PropertyGrid exposes VisualStylesModeChanged event although VisualStylesMode is hidden #14803

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CheckBox/RadioButton: ToggleSwitch renders black background when BackColor is Transparent #14807

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CheckBox/RadioButton: ToggleSwitch overlaps text when RightToLeft is enabled and AutoSize is false #14808

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Setting the CheckAlign as TopCenter/BottomCenter/MiddleCenter is not working for RadioButton/CheckBox control with Appearance as ToggleSwitch #14810

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ONLY FOR TESTING: Integration-4 for the new .NET 11 API - #14792

ONLY FOR TESTING: Integration-4 for the new .NET 11 API#14792
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SimonZhao888 Jul 23, 2026

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SimonZhao888 Jul 23, 2026 •

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KlausLoeffelmann commented Jul 21, 2026 • edited by dotnet-policy-service Bot Loading Uh oh! There was an error while loading. Please reload this page.

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Additional modern ComboBox work in Integration-4

Microsoft Reviewers: Open in CodeFlow

Microsoft Reviewers: Open in CodeFlow

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LeafShi1 Jul 22, 2026

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LeafShi1 Jul 22, 2026

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LeafShi1 Jul 22, 2026

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SimonZhao888 Jul 23, 2026

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SimonZhao888 Jul 23, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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KlausLoeffelmann commented Jul 21, 2026 •

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SimonZhao888 Jul 23, 2026 •

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