动态创建listbox和statusbar若干个后，如何对其中某个判断并且发送消息

    
 stat:=TStatusBar.Create(self);
 lst:=TListBox.Create(self);
with lst do
    begin
      parent:=groupbox;
      Align:=alClient;
      Name:='lst'+inttostr(i);
    end;

    with stat do
    begin
      parent:=groupbox;
      Align:=alBottom;
      Name:='stat'+inttostr(i);
      tag:=i;
      Panels.add;
      Panels[0].Text:=IntToStr(i);
    end;