ButtonBase.OnMouseDown Method

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

Raises the OnMouseDown event.

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

protected override void OnMouseDown(
	MouseEventArgs mevent
)

Parameters

mevent
Type: System.Windows.Forms.MouseEventArgs

A MouseEventArgs that contains the event data.

Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.

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

Notes to Inheritors

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

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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