From: Paul Leonard <pleonard23@...>
Date: 2005-05-21T08:20:07+09:00
Subject: Re: Win32API question - PathAppend (in/out variable issue)

 Daniel - 

This works:

require "Win32API"

MAX_PATH = 256

inbuf = Array.new.fill(0.chr,0..MAX_PATH-1).join

PathAppend = Win32API.new("shlwapi","PathAppend","PP","L")

path = 'C:\foo'

inbuf[0..path.length-1] = path

PathAppend.call(inbuf, 'bar'+ 0.chr)

puts inbuf.strip!

Returns:
C:\foo\bar


 On Sat, 21 May 2005 05:40:15 +0900, Daniel Berger wrote:
>�Hi all,
>
>�Ruby 1.8.2.
>�Windows XP Pro
>
>�I'm having a bit of an issue with an in/out variable with the
>�PathAppend() function. �I have no problem when I use a C extension,
>�but when I used Win32API, I don't get the desired output. �Here's
>�the code:
>
>�# test.rb
>�require "Win32API"
>
>�PathAppend = Win32API.new("shlwapi","PathAppend","PP","L")
>
>�path = 'C:\foo'
>�PathAppend.call(path, 'bar')
>
>�p path # 'C:\foo', but expect 'C:\foo\bar'
>
>�I've tried padding 'path' and a few other tricks, but nothing has
>�worked. �What am I doing wrong?
>
>�Regards,
>
>�Dan