- the property to fix a window on another one. Example: You have
menu in a Frame, and select an option of submenu, which causes that
another window unfolds. I want that that window is mounted on the
Frame of the Menu until the user the closing.

- the same Frame (with menu) truth, and in submenu File you have
submenu Cerrar. I want that cfuando the user it selects that SubMenu
to close, appears a Dialog with a message, that to confir itself if
this safe one. I already have all the proven classes, but I need
that event that happens alli. It has algun I cosay links to do this!