Control::OnPreviewKeyDown Method (PreviewKeyDownEventArgs^)
.NET Framework (current version)
Raises the PreviewKeyDown event.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
protected: [SecurityPermissionAttribute(SecurityAction::InheritanceDemand, Flags = SecurityPermissionFlag::UnmanagedCode)] [SecurityPermissionAttribute(SecurityAction::LinkDemand, Flags = SecurityPermissionFlag::UnmanagedCode)] virtual void OnPreviewKeyDown( PreviewKeyDownEventArgs^ e )
Parameters
- e
-
Type:
System.Windows.Forms::PreviewKeyDownEventArgs^
A PreviewKeyDownEventArgs that contains the event data.
Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.
The OnPreviewKeyDown 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 OnPreviewKeyDown in a derived class, be sure to call the base class's OnPreviewKeyDown method so that registered delegates receive the event.
.NET Framework
Available since 2.0
Available since 2.0
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