'宣言 Public Delegate Sub SelectedIndexChangingEventHandler( _ ByVal sender As System.Object, _ ByVal e As SelectedIndexChangingEventArgs _ )
public delegate void SelectedIndexChangingEventHandler( System.object sender, SelectedIndexChangingEventArgs e )
パラメータ
- sender
 - イベントのソース。
 - e
 - イベントデータを含む SelectedIndexChanging オブジェクト。