sender
The source of the event.
e
A MouseEventArgs that contains the event data.
Fired when the control is clicked by the mouse.
Fired when the control is double clicked by the mouse.
Fired when the mouse pointer is over the control and a mouse button is pressed.
Fired when the mouse pointer is moved over the control.
Fired when the mouse pointer is over the control and a mouse button is released.
Fired when the mouse wheel moves while the control has focus.
Fired when the user clicks the CheckedListBox control with the mouse.