ButtonBase.OnKeyDown Method (KeyEventArgs)

 

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

Raises the OnKeyUp event.

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

protected override void OnKeyDown(
	KeyEventArgs kevent
)

Parameters

kevent
Type: System.Windows.Forms.KeyEventArgs

A KeyEventArgs that contains the event data.

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

The OnKeyDown 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.

System_CAPS_noteNote

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

Notes to Inheritors:

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

.NET Framework
Available since 1.1
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