Получение информации о TaskBar

var
  Form1: TForm1;

AppBarData : TAppBarData;
bAlwaysOnTop, bAutoHide : boolean;
Clrect,rect : TRect;
Edge: UInt;

procedure DetectTaskBar;
begin
  AppBarData.hWnd := FindWindow('Shell_TrayWnd', nil);
  AppBarData.cbSize := sizeof(AppBarData);
  bAlwaysOnTop := (SHAppBarMessage(ABM_GETSTATE, AppBardata)
  and ABS_ALWAYSONTOP) <> 0;
  bAutoHide := (SHAppBarMessage(ABM_GETSTATE, AppBardata)
  and ABS_AUTOHIDE) <> 0;
  GetClientRect(AppBarData.hWnd, Clrect);
  GetWindowRect(AppBarData.hwnd, rect);
  if rect.top > 0 then
    Edge := ABE_BOTTOM
  else
  if rect.bottom < screen.height then
    Edge:=ABE_TOP
  else
  if rect.right < screen.width then
    Edge:=ABE_LEFT
  else
    Edge:=ABE_RIGHT;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  DetectTaskBar;

  StringGrid1.Cells[0,0] := 'Выше других окон';
  StringGrid1.Cells[0,1] := 'Автоматически убирать с экрана';
  StringGrid1.Cells[0,2] := 'Клиентская область';
  StringGrid1.Cells[0,3] := 'Оконная область';
  StringGrid1.Cells[0,4] := 'Края';

  if bAlwaysOnTop = true then
    StringGrid1.Cells[1,0] := 'true'
  else
    StringGrid1.Cells[1,0] := 'false';

  if bAutoHide = true then
    StringGrid1.Cells[1,1] := 'true'
  else
    StringGrid1.Cells[1,1] := 'false';

  StringGrid1.Cells[1,2] := IntToStr(Clrect.Left)+':'+IntToStr(Clrect.Top) +
  ':'+IntToStr(Clrect.Right)+':'+IntToStr(Clrect.Bottom);

  StringGrid1.Cells[1,3] := IntToStr(rect.Left)+':'+IntToStr(rect.Top) +
  ':'+IntToStr(rect.Right)+':'+IntToStr(rect.Bottom);

  StringGrid1.Cells[1,4] := IntToStr(Edge);
end;