API Delphi

unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs,shellapi, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
var
AB : TAppBarData;
sPos:string;
begin
AB.cbSize := sizeof(AB);
SHAppBarMessage(ABM_GETTASKBARPOS, AB);
case AB.uEdge of
0:sPos:='Left';
1:sPos:='Top';
2:sPos:='Right';
3:sPos:='Bottom';
end;
ShowMessage('Taskbar is at the '+sPos+' Position.');
end;
end.