http://www.cnblogs.com/76674718/archive/2010/06/29/1767394.html
当 Windows Form 应用程序启动时，会以下列顺序引发主要表单的启动事件：
System.Windows.Forms.Control.HandleCreated
System.Windows.Forms.Control.BindingContextChanged
System.Windows.Forms.Form.Load
System.Windows.Forms.Control.VisibleChanged
System.Windows.Forms.Form.Activated
System.Windows.Forms.Form.Shown
当应用程序关闭时，会以下列顺序引发主要表单的关闭事件：
System.Windows.Forms.Form.Closing
System.Windows.Forms.Form.FormClosing
System.Windows.Forms.Form.Closed
System.Windows.Forms.Form.FormClosed
System.Windows.Forms.Form.Deactivate