I have submitted a bug report whose text I reproduce below. A file with code demonstrating the problem is attached.
http://sourceforge.net/tracker/index.php?func=detail&aid=1164780&group_id=16572&atid=116572

Regards,
Rob.

The attached file shows an example of a bitmap label that remains blank on creation until SetImage() is called.

(Win32::GUI 1.0, Win98/win2k, perl 5.8)

It seems to work fine for Icons.

# This example shows a problem with Win32::GUI::Labels
# It seems that they don't display bitmaps unless
# you call SetImage();  Icons do work though ...
#

use strict;
use warnings;  

use Win32::GUI 1.0;
use Win32::GUI::BitmapInline ();

# 100x100 bitmap created using commandline:
# perl -MWin32::GUI::BitmapInline -e inline('bitmap.bmp') > bitmap.pl
my $Bitmap1 = new Win32::GUI::BitmapInline( q(
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) );

my $mw = new Win32::GUI::Window (
        -title => "Label Bitmap Bug",
        -size => [200,200],
);

my @info = $Bitmap1->Info() or die "getting bitmap size";

my $b = $mw->AddLabel (
        -bitmap => $Bitmap1,
        -width => $info[0],
        -height => $info[1],
) or die "Creating bitmap label";

$mw->AddButton (
  -text => "Fix Bug",
  -onClick => sub { $b->SetImage($Bitmap1); },
  -top => 110,
) or die "Button";

$mw->Show();
Win32::GUI::Dialog();
exit(0);

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