PMyInfo=^TMyInfo;
TMyInfo=record
    iCode:integer;
end;对于TreeView和ListView,在增加节点或行时:
var
    MyInfo:PMyInfo;   
        new(MyInfo);
    TreeNode.Data:=MyInfo或ListItem.Data:=MyInfo;在点击读取时:
    PMyInfo(TreeNode.Data)^.iCode
    PMyInfo(ListItem.Data)^.iCode