Win32::GUI::Button
==================
map threestate => 3state

Win32::GUI::Font
================
'size' attribute confused with array

Win32::GUI::ImageList
=====================
support Icon, Masked

Win32::GUI::Toolbar
===================
Add subitem support

Need to support these objects
=============================
Win32::GUI::DC
Win32::GUI::Region
Win32::GUI::Trackbar

Wishlist
========
default sizing algorithm
stylesheets

