>Hi all
>I have this scenario:
>Form1 modeless in screen,
>calls form2 modeless as top level, which
>calls form3 modal in top level,
>
>Form2 is minimized and then maximized.After that Form2 and 3 are frozen
>Any way to resolve this issue

You may try to Show Window (form2.name) or some other window manipulation technique from that arsenal.

Message #1231189 may also help.