Как найти все установленные компоненты?

uses ToolsApi;
{....}
var
  a, i: Integer;
begin
  with (BorlandIDEServices as IOTAPackageServices) do
  begin
    for a := 0 to GetPackageCount - 1 do
    begin
      for i := 0 to GetComponentCount(a) - 1 do
      begin
        {get each component name with GetComponentName(a, i);}
      end;
    end;
  end;
end;