This enumeration is used by the TreeViewEventArgs to determine how the particular event was initiated. public enum TreeViewAction { Unknown = 0 , ByKeyboard = 1 , ByMouse = 2 , Collapse = 3 , Expand = 4 } Hierarchy System.Object Returned ByTreeViewCancelEventArgs.Action , TreeViewEventArgs.Action Passed ToTreeViewCancelEventArgs.TreeViewCancelEventArgs() , TreeViewEventArgs.TreeViewEventArgs() ![]() |