(20) Lazarus学习之ListFilterEdit1过滤ListBox1数据CheckListBox1，ColorListBox1，FileListBox1

procedure TForm1.Edit1KeyDown(Sender: TObject; var Key: Word; Shift: TShiftState
  );
begin
  if ( key=40 ) and (listbox2.Items.Count>0) and listbox2.Visible  then begin    //defines.icn  VK_DOWN = 40;
   ListBox2.SetFocus;
   ListBox2.ItemIndex:=0;
  end;
end;

其他参考：

带历史记忆，并模糊带出功能的Edit

 

链接：https://pan.baidu.com/s/1fpuJ13Nwrx4f1AGQic8lPQ
提取码：0xxu