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ButtonBase.OnMouseEnter Method

.NET Framework 4.5

Other Versions

This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.

Raises the OnMouseEnter event.

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

Syntax

C++

'Declaration
Protected Overrides Sub OnMouseEnter ( _
	eventargs As EventArgs _
)

Parameters

eventargs: Type: System.EventArgs
An EventArgs that contains the event data.

Remarks

Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.

The OnMouseEnter method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Note
Do not call OnMouseEnter if the button is disabled (this includes call to the base class's OnMouseEnter method when you override OnMouseEnter in a derived class). When disabling the button in an override of OnMouseEnter, call the base class's OnMouseEnter method before disabling the button, or do not call it at all.

Notes to Inheritors

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

Version Information

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference

ButtonBase Class

System.Windows.Forms Namespace

OnMouseLeave

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