From: Masaki Suketa <masaki.suketa@...>
Date: 2010-01-23T07:15:21+09:00
Subject: Re: win32ole with COM method taking two out refs

Hello,
On Sat, Jan 23, 2010 at 12:13:09AM +0900, Tallak Tveide wrote:

> My application:
>   ...
>   items =  Object.new # output
>   errors =  Object.new # output
>   group.OPCItems.AddItems 1, ['', 'Random.Int1'], [0, 1], items, errors
>   ..
> 
> The olegen code for the method looks like this:
> 
>   # VOID AddItems
>   # Adds OPCItem objects to the collection
>   #   I4 arg0 --- NumItems [IN]
>   #   BSTR arg1 --- ItemIDs [IN]
>   #   I4 arg2 --- ClientHandles [IN]
>   #   I4 arg3 --- ServerHandles [OUT]
>   #   I4 arg4 --- Errors [OUT]
>   #   VARIANT arg5 --- RequestedDataTypes [IN]
>   #   VARIANT arg6 --- AccessPaths [IN]
>   def AddItems(arg0, arg1, arg2, arg3, arg4, arg5=nil, arg6=nil)
>     ret = _invoke(1610743820, [arg0, arg1, arg2, arg3, arg4, arg5, 
> arg6], [VT_I4, VT_BYREF|VT_ARRAY|VT_BSTR, VT_BYREF|VT_ARRAY|VT_I4, 
> VT_BYREF|VT_ARRAY|VT_I4, VT_BYREF|VT_ARRAY|VT_I4, VT_VARIANT, 
> VT_VARIANT])
>     @lastargs = WIN32OLE::ARGV
>     ret
>   end
> 

How about using WIN32OLE_VARIANT?

  items = WIN32OLE_VARIANT(null, WIN32OLE::VARIANT::VT_NULL)
  errors = WIN32OLE_VARIANT(null, WIN32OLE::VARIANT::VT_NULL)
  group.OPCItems.AddItems 1, ['', 'Random.Int1'], [0, 1], items, errors
  p items.value
  p errors.value

WIN32OLE_VARIANT is available in Ruby 1.9 or later.
And you can't use WIN32OLE_VARIANT with olegen code.
Could you try WIN32OLE_VARIANT without olegen code?

  Regards,
  Masaki Suketa