Your code is O. K., no additional tutorial needed!

The code runs fine for me on

This is perl, v5.8.6 built for MSWin32-x86-multi-thread
(with 3 registered patches, see perl -V for more detail)

Copyright 1987-2004, Larry Wall

Binary build 811 provided by ActiveState Corp. http://www.ActiveState.
+com
[download]

but fails with an error popup on

This is perl, v5.8.8 built for MSWin32-x86-multi-thread
(with 21 registered patches, see perl -V for more detail)

Copyright 1987-2006, Larry Wall

Binary build 816 [255195] provided by ActiveState http://www.ActiveSta
+te.com
[download]

On both installations Win32::API identifies as $VERSION==0.41