By default, the SplitContainer.OnKeyUp(KeyEventArgs) event handler allows the user to move the splitter up when the UP arrow key is pressed. The SplitContainer.OnKeyUp(KeyEventArgs) event handler also draws the SplitContainer.SplitterRectangle to show the current position of the splitter while it is moving.

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

The SplitContainer.OnKeyUp(KeyEventArgs) 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.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Assembly Versions: 2.0.0.0
Since: .NET 2.0