use Win32::API;
use strict;

#
# Omitted code: 
# (1) start the helpctr.exe process
# (2) create time 0 benchmark object
#
# SetWindowsHookEx prototype info -
# HHOOK SetWindowsHookEx (
#       int idHook,         // hook type                 
#       HOOKPROC lpfn,      // hook procedure
#       HINSTANCE hMod,     // handle to application instance
#       DWORD dwThreadId    // thread identifier
# );
#

use constant WH_CALLWNDPROCRET => 12;

my $SetWindowsHookEx = new Win32::API( "user32", "SetWindowsHookEx",
                                        [qw(I P N N)], 'N');

# how to determine hInstance(s) of helpctr for the following call?

my $Hook = $SetWindowsHookEx->Call( WH_CALLWNDPROCRET,
                                    'CallWndRetProc', $hInstance, 0);
</b>

Am I right in thinking that the best way to determine the
state of the window is to evaluate all the return values of
the message processed by that window?

Thanks much.

Marshall

Random thot - it would be really cool if this site used 
something like the GURPs system for tracking the monastic 
ascension of users - something like the character
development in the PC game "Fallout".