TLayer32.CursorId

procedure TForm1.FormMouseMove(Sender: TObject; 
  Shift: TShiftState; X,Y: Integer);
var
  layer: TLayer32;
begin
  if not (ssLeft in Shift) then
  begin
    layer := layeredImage.GetLayerAt(Types.Point(X,Y));
    if Assigned(layer) then
      Cursor := layer.CursorId else
      Cursor := crDefault;
  end;