From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2010-07-08T18:19:40+09:00
Subject: Re: Changing registry values with Win32::Registry

On Thu, Jul 8, 2010 at 10:52 AM, Navaneet Kumar <tonavaneet@gmail.com> wrote:
> How do we handle null value from opened HKEY instance. if
> (reg.read_i(name)!="") in below line I have tried but it doesn't work
> properly.
>
> Ex:
> Win32::Registry::HKEY_LOCAL_MACHINE.open(REG_PATH_1,Win32::Registry::Constants::KEY_ALL_ACCESS)
> do |reg|
>    if (reg.read_i(name)!="")
>              return reg.read_i(name)
>            end
>    end
>
> I need another instance to open for different REG_PATH. The reason
> behind that is if the reg key is in first path then return the value
> other wise open the key to read the reg key from different path.

I have no idea about that API, but if read_i is returning nil for
non-existing keys, you can try this:

unless (key = reg.read_i(name)).nil?
  return key
end

Jesus.