• Article

RichTextBox.OnMouseEnter Method

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Called before the MouseEnter event occurs.

Namespace:  System.Windows.Controls
Assembly:  System.Windows (in System.Windows.dll)

Syntax

'Declaration
Protected Overrides Sub OnMouseEnter ( _
    e As MouseEventArgs _
)

protected override void OnMouseEnter(
    MouseEventArgs e
)

Parameters

Remarks

The OnMouseEnter method is called before any event handler for the MouseEnter event is called. This method allows derived classes to handle the MouseEnter event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

The RichTextBox implementation marks the MouseEnter event as handled by setting the Handled property of the event data to true.

Notes to Inheritors

When overriding the OnMouseEnter method in a derived class, be sure to call the base class’s OnMouseEnter method so that registered delegates receive the event.

Version Information

Silverlight

Supported in: 5, 4

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.