procedure OpenChildForm(FormClass: TFormClass; var Fm; AOwner:TComponent);
　　var
　　  I: Integer;
　　  Child: TForm;
　　begin
　　  for I := 0 to Screen.FormCount - 1 do
　　    if Screen.Forms[I].ClassType = FormClass then
　　    begin
　　      Child := Screen.Forms[I];
　　      if Child.WindowState = wsMinimized then
　　        ShowWindow(Child.Handle, SW_SHOWNORMAL)
　　      else
　　        ShowWindow(Child.handle,SW_SHOWNA);
　　      if (not Child.Visible) then Child.Visible := True;
　　        Child.BringToFront;
　　        Child.Setfocus;
　　        TForm(Fm) := Child;
　　        Exit;
　　    end;
　　  Child := TForm(FormClass.NewInstance);
　　  TForm(Fm) := Child;
　　  Child.Create(AOwner);
　　end;