Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Occurs when script running inside of the window encounters a run-time error.
Occurs when the current window obtains user input focus.
Occurs when the window's document and all of its elements have finished initializing.
Occurs when user input focus has left the window.
Occurs when the user uses the mouse to change the dimensions of the window.
Occurs when the user scrolls through the window to view off-screen text.
Occurs when the current page is unloading, and a new page is about to be displayed.