Ruby和win32ole:无法调用win32ole_类型方法(类型库)

好吧,所以我正在用Ruby做一些很好的OLE(抱歉)自动化,我遇到了一个奇怪的问题。我正试图从类型库中提取一些数据。这在VB中工作:

Dim c As New TControlsLib.LangCombo
Dim l As TControlsLib.Language
Dim converter As New TControlsLib.LcidConverter
c.AddAllSystemLanguages mtAllKnownLanguages, True
For Each l In c.Languages
  Debug.Print l.DisplayName & ";" & converter.IsoAbbreviationFromLcid(l.Lcid)
Next

tcontrolslib是类型库(全名:“trados controls type library”)。我也知道mtallknownlanguages是一个常数,等于3。

所以,我试着用Ruby做同样的事情。这是我的IRB会议:

irb(main):001:0> require 'win32ole'
=> true
irb(main):002:0> t = "TRADOS Controls Type Library"
=> "TRADOS Controls Type Library"
irb(main):003:0> c = WIN32OLE_TYPE.new(t, "LangCombo")
=> LangCombo
irb(main):004:0> converter = WIN32OLE_TYPE.new(t, "LcidConverter")
=> LcidConverter
irb(main):005:0> c.ole_methods
=> [QueryInterface, AddRef, Release, GetTypeInfoCount, GetTypeInfo, 
GetIDsOfNames, Invoke, Enabled, Enabled, Languages, Refresh, AddSystemLanguage, 
SelectedItem, SelectedItem, SelectLanguage, Clear, AddAllSystemLanguages, 
DroppedDownHeight, DroppedDownHeight, AddCustomLanguage, AddLanguage, Type, 
Type, RemoveLanguage, OnSelectionChanged]
irb(main):006:0> c.AddAllSystemLanguages(3, true)
NoMethodError: undefined method `AddAllSystemLanguages' for LangCombo:WIN32OLE_TYPE
from (irb):6

我也不能调用任何其他方法。实际上,似乎我不能调用任何类型库方法。

我做错什么了?