Raises the KeyUp event.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.
The 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 in a derived class, be sure to call the base class's method so that registered delegates receive the event.
' This example demonstrates how to use the KeyUp event with the Help class to display ' pop-up style help to the user of the application. When the user presses F1, the Help ' class displays a pop-up window, similar to a ToolTip, near the control. This example assumes ' that a TextBox control, named textBox1, has been added to the form and its KeyUp ' event has been contected to this event handler method. Private Sub textBox1_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles textBox1.KeyUp ' Determine whether the key entered is the F1 key. Display help if it is. If e.KeyCode = Keys.F1 Then ' Display a pop-up help topic to assist the user. Help.ShowPopup(textBox1, "Enter your first name", New Point(textBox1.Right, Me.textBox1.Bottom)) End If End Sub 'textBox1_KeyUp