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ScrollBar.OnMouseWheel Method

.NET Framework 4.5

Raises the MouseWheel event

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

protected override void OnMouseWheel(
	MouseEventArgs e
)

Parameters

e: Type: System.Windows.Forms.MouseEventArgs
A MouseEventArgs

Remarks

The ScrollBar control will convert mouse wheel movements to scrolling when the ScrollBar is in focus.

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

The OnMouseWheel 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.

Notes to Inheritors

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

Version Information

.NET Framework

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

.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

ScrollBar Class

System.Windows.Forms Namespace

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