I was developing an Internet Chat app, and I needed to have each chat window
showed in the task bar. I use the following code, but it works as long as
the application isn't minimized, while the app is minimized all the child
windows are hidden from the task bar.

procedure TPrivChat.CreateParams;
begin
  inherited;
  Params.ExStyle := WS_EX_APPWINDOW;
end;

just redefined the form's CreateParams method, it can be used in order to
change some Delphi's default window creation params.....