[perl-win32-gui-users] How to refresh a window

[A <ex...@se...>]

Hi,
I have an application that uses Win32::GUI.
This program creates a window and writes, as it is running , some
information to this window. This  application runs for a quite long
time(about 20 minutes or longer).So far so good. A problem begins 
when
a user switches from this program to another program and after 
some
time returns back to my program.The window created by my 
program is
not refreshed immediately to the state before switching but I must
wait until my program writes to that window. And because the 
window is
not refreshed quickly  it seems that the program does not run any
longer. What is  the best way how to refresh the window and show 
users
that the program is still running? Thank you for any good idea.

Ladislav