This.LineStyle= 1  && tvwRootLines
This.Style= 7  && tvwTreelinesPlusMinusPictureText
This.Nodes.Add(,,"Sport","体育")
This.Nodes.Add("Sport",4,"Ball","球类")
This.Nodes.Add("Ball",4,,"足球")
This.Nodes.Add("Ball",4,,"篮球")
This.Nodes.Add("Ball",4,,"排球")
This.Nodes.Add("Sport",4,"Swim","游泳")
This.Nodes.Add("Swim",4,,"蛙泳")
This.Nodes.Add("Swim",4,,"自由泳")
This.Nodes.Add(,,"Army","军事")
This.Nodes.Add("Army",4,"Kinds","军种")
This.Nodes.Add("Kinds",4,,"海军")
This.Nodes.Add("Kinds",4,,"陆军")
This.Nodes.Add("Kinds",4,,"空军")
This.Nodes.Add("Army",4,"Weapon","武器")
This.Nodes.Add("Weapon",4,,"枪")
This.Nodes.Add("Weapon",4,,"大炮")


请麻烦写下注释，尽量详细些，中间“4”和开头的“，，”特别注明下！！！