EventOrderInWindowsForms.txt

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20190424

ref:
https://docs.microsoft.com/en-us/dotnet/framework/winforms/order-of-events-in-windows-forms?view=netframework-4.8

Application Startup and Shutdown Events
The Form and Control classes expose a set of events related to application startup and shutdown. When a Windows Forms application starts, the startup events of the main form are raised in the following order:
  Control.HandleCreated
  Control.BindingContextChanged
  Form.Load
  Control.VisibleChanged
  Form.Activated
  Form.Shown

When an application closes, the shutdown events of the main form are raised in the following order:
  Form.Closing
  Form.FormClosing
  Form.Closed
  Form.FormClosed
  Form.Deactivate
  
  
Focus and Validation Events
When you change the focus by using the keyboard (TAB, SHIFT+TAB, and so on), by calling the Select or SelectNextControl methods, or by setting the ActiveControl property to the current form, focus events of the Control class occur in the following order:
  Enter
  GotFocus
  Leave
  Validating
  Validated
  LostFocus

When you change the focus by using the mouse or by calling the Focus method, focus events of the Control class occur in the following order:
  Enter
  GotFocus
  LostFocus
  Leave
  Validating
  Validated