[Sotrono]

Hola, para Xp hacelo asi:

Código Delphi [-]
  
ShowWindow( Application.Handle, SW_HIDE );
SetWindowLong( Application.Handle, GWL_EXSTYLE,
                      GetWindowLong(Application.Handle, GWL_EXSTYLE) or 
                      WS_EX_TOOLWINDOW and not WS_EX_APPWINDOW);
ShowWindow( Application.Handle, SW_SHOW );

y para mostrarla:

Código Delphi [-]
ShowWindow( Application.Hanlde, SW_SHOW );

Bytes...