hide show app from task bar

Hi.
 Use this code to hide my application from task bar :

  ShowWindow(Application.Handle, SW_HIDE);

  SetWindowLong(Application.Handle, GWL_EXSTYLE,
          GetWindowLong(Application.Handle, GWL_EXSTYLE) or WS_EX_TOOLWINDOW);

  ShowWindow(Application.Handle, SW_SHOW);

but how can i restore task bar (to show my application on task bar).

This is second question:
I want when I minimize the application (from task bar) the main form stay normal (not minimized)