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ButtonBase.OnMouseEnter Method

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)

protected override void OnMouseEnter(
	EventArgs eventargs
)

Parameters

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

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.

NoteNote

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.

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

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