Slider ignores PointerPressed and PointerReleased events

Describe the bug

For some reason both PointerPressed and PointerReleased events are not getting fired.

Schermopname.2025-04-16.195718.mp4

This might be due to the Thumb of the Slider.
Can't the Thumb get events for holding and dragging?
Or is there a way to add those events manually to the Slider without creating a custom Slider?

Steps to reproduce the bug

1. Create a WinUI 3 package app
2. Add a slider with both PointerPressed and PointerReleased events
3. Set a breakpoint in both events
4. Run the app with the debugger and click ok the slider

Expected behavior

Event should be fired and stopped at the breakpoint.

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.7.1: 1.7.250401001

Windows version

Windows 11 (24H2): Build 26100

Additional context

No response

[castorix]

This works for me :

MySlider.AddHandler(UIElement.PointerPressedEvent, new PointerEventHandler(MySlider_PointerPressed), true); MySlider.AddHandler(UIElement.PointerReleasedEvent, new PointerEventHandler(MySlider_PointerReleased), true);

    private void MySlider_PointerPressed(object sender, Microsoft.UI.Xaml.Input.PointerRoutedEventArgs e)
    {           
        Debug.WriteLine("Pointer Pressed on Slider");
    }

    private void MySlider_PointerReleased(object sender, Microsoft.UI.Xaml.Input.PointerRoutedEventArgs e)
    {            
        Debug.WriteLine("Pointer Released on Slider");
    }

That works but why doesn't its events work out of the box?
If that was intentionally, then that should be described in the documentation.

[castorix]

That works but why doesn't its events work out of the box? If that was intentionally, then that should be described in the documentation.

There is in doc :

"
Specific Windows Runtime controls may have class-based handling for the PointerPressed input event. If so, the control probably has an override for the method OnPointerPressed. Typically the event is marked handled by the class handler, and the PointerPressed event is not raised for handling by any user code handlers on that control. For example, ButtonBase has class handling that handles PointerPressed and instead fires Click.
"

and in source code :

IFC(pArgs->put_Handled(TRUE));

Not finding that text in the either Controls > Slider or in the Slider class page in the documentation.

[castorix]

At : UIElement.PointerPressed Event

Alright. I'll close it here.
Personally I find that way to deep down and a warning should be put higher preferably in the Slider class page.