unit Unit1;    interface    uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;    type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;    var
  Form1: TForm1;    implementation    uses shellapi;    {$R *.DFM}
function IsTaskbarAutoHideOn : boolean;
var
  ABData : TAppBarData;
begin
  ABData.cbSize := Sizeof(ABData);
  Result := (SHAppBarMessage(ABM_GETSTATE, ABData)
             and ABS_AUTOHIDE) > 0 ;
end;    procedure TForm1.Button1Click(Sender: TObject);
begin
    if IsTaskbarAutoHideOn then caption:='命令列自動隱藏' else caption:='命令列非自動隱藏';
end;    end.