Re^6: Can't change icon with win32 module

[Anonymous Monk]

$^E is $^E, use $^E instead of SomeFunctionName

[bulk88]

$^E is 10 times slower in NYTProf than Win32::GetLastError, plus you have to cast it with a +0 to get an error code plus $^E doesn't know the text for the 12*** or 15*** series.

[Anonymous Monk]

I don't see how that is important, $^E is just four clicks away, always there, needs no use lines or nothing

[palkia]

Here is my entire code (it is just an experiment at this stage)

use strict;
use warnings;
use Win32;
use Win32::GUI();
use Win32::API;
Win32::API->Import('kernel32','BOOL SetConsoleIcon(HWND icon)');
eval{SetConsoleIcon( Win32::GUI::Icon->new('box1.ico')->{-handle});}; 
+#eval 2 counter the die from undef return from "new" with "->"
print 0+$^E; print "   ---\n".'$^E = '; #separated \n just in case
print $^E; print "   ---\n".'$! = ';
print $!; print "   ---\n".'$@ = ';
print $@; print "   ---\n".'FormatMessage = ';
print Win32::FormatMessage(Win32::GetLastError());
sleep 50;
exit;

At this version it says

0   ---
$^E =    ---
$! = Bad file descriptor   ---
$@ =    ---
FormatMessage = The operation completed successfully.

for box2.ico as well as for zzz.pl (instead of box1.ico) it says

0   ---
$^E =    ---
$! = Bad file descriptor   ---
$@ = Can't use an undefined value as a HASH reference at E:\perl exper
+iments\change icon exp 2.pl line 8.
   ---
FormatMessage = The operation completed successfully.

The practical difference between the 3 is that only box1.ico is showed, the other 2 don't change the icon.
When I target a non-existing file, it says

2
The system cannot find the file specified.

It seems to me that Win32::GUI::Icon->new('box1.ico') is just undef when used on box2.ico as well as for zzz.pl.