Occurs before the control becomes visible for the first time.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
You can use this event to perform tasks such as allocating resources used by the control.
If the UserControl is part of an MDI child form, the event will occur each time the child form is shown. In this case, you should put any one-time initialization code in the UserControl instead of a event handler.
The UserControl is created. In some circumstances, this can cause the event to occur more than one time. For example, the event occurs when the UserControl is loaded, and again if the handle is recreated. (One way that a handle is recreated is by calling the RecreateHandle method.) To account for the event occurring more than one time, you should put any one time initialization code in the UserControl constructor instead of a event handler. In addition, you should not add data bindings to the UserControl in a event handler.event occurs when the handle for the
For more information about handling events, see Handling and Raising Events.
The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the MessageBox.Show with Console.WriteLine or appending the message to a multiline TextBox.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
To run the example code, paste it into a project that contains an instance of type UserControl named UserControl1. Then ensure that the event handler is associated with the event.
Available since 1.1