From: Colin Bartlett <colinb2r@...>
Date: 2010-04-17T02:06:56+09:00
Subject: Re: How to use AutoIt in Ruby

On Fri, Apr 16, 2010 at 5:45 PM, Colin Bartlett <colinb2r@googlemail.com> wrote:
> For example this MsgBox code works in JRuby 1.4 and Ruby 1.8.6
> but (it seems) not in Ruby 1.9.1 (at least not for me!):
>  User32_MsgBox = User32[ 'MessageBoxA', 'ILSSI' ]
>  result, = User32_MsgBox.call(0, text, title, buttons + icon + modality)
>
> So if anyone knows how to use "dl" and
> Win32API.new( 'user32', 'SendInput', 'IPI', 'I' ) to send keystrokes
> (or can pop up a MsgBox in Ruby 1.9.1)
> I'd be very interested to see how.

Sorry: in case anyone is confused by that User32[...], the "proper" code is:

# note that Win32API is deprecated after Ruby 1.9.1 - use dl directly instead
require 'dl'
User32 = DL.dlopen( 'user32' )
  # works in JRuby 1.8 and MRI Ruby 1.8.6, but not in 1.9.1;
  User32_MsgBox = User32[ 'MessageBoxA', 'ILSSI' ]
    # User32_MsgBox.call returns an array:
    #   [return_value, [0, text, title, buttons + icon + modality]]
    # we only want the return value, hence "result, ="
      result, = User32_MsgBox.call(0, text, title, buttons + icon + modality)
puts result

But I'd still be interested if anyone can get this to work in Ruby 1.9.1.
I get this error message from
  User32_MsgBox = User32[ 'MessageBoxA', 'ILSSI' ]
in '[]': wrong number of arguments(2 for 1) (Argument Error)