From: Tom Robinson <tom@...>
Date: 2004-07-13T08:12:24+09:00
Subject: Using Win32API to load an icon from .ico file

Has anyone successfully managed to do this?  I'm trying to write an
app using vruby which adds icons to the systray.  VRuby comes with an
example of how to do this, which works, except it does not say how to
load the icons you want from .ico files.  Instead it just uses icons
out of the user32.dll I think.  This is the code it uses to load the
icons:

  LoadIcon = Win32API.new("user32","LoadIcon","II","I")
  QUESTIONICON= LoadIcon.call(0,32514)

That works fine, and QUESTIONICON can then be used to call
create_trayicon, but I'm trying to do this:

  LoadIconA = Win32API.new("user32","LoadIcon",['I','P'],"I")
  FOOICON= LoadIconA.call(0,"myicon.ico")

I think if you give a string as a second argument to the LoadIcon call
in the user32.dll it'll try and load from a file, but I'm not 100%
sure.  The docs from MS say that LoadIcon is deprecated and you should
use LoadImage but that's even more complicated from what I can tell.
I've found a few examples on the web of people who've used LoadIcon to
load from .ico files (I think), but none of them are in ruby.  I'm not
sure if I'm specifying the parameter types correctly using ['I','P']
for an integer and a string either.  Anyway, it loads a blank icon at
the moment so it isn't working.

Anyone managed to accomplish this before?

-- 
tom@alkali.spamfree.org
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