Occurs before a ToolTip is initially displayed. This is the default event for the ToolTip class.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Calling properties in this event that cause the underlying window handle to be recreated, such as IsBalloon, will result in an exception being thrown.
The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the event. This report helps you to learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing MessageBox.Show with Console.WriteLine or appending the message to a multiline TextBox.
To run the example code, paste it into a project that contains an instance of type ToolTip named ToolTip1. Then ensure that the event handler is associated with the event.