[ruby-core:104876] [Ruby master Bug#16116] ruby2.6.3(x86/x64) use win32ole could not new Object, return 0x80070057

Issue #16116 has been updated by krolchatina (Dmitry Kirillov).

File ClassLibraryForRuby.zip added

I have the same issue with Ruby 3.0.2 and .NET COM assemblies.  The problem seems to be related to how the assembly is registered: If InprocServer32/Default contains the full path to mscoree.dll (C:\Windows\system32\mscoree.dll) there is no problem with WIN32OLE.new 
If InprocServer32/Default contains only mscoree.dll (which seems to be the default nowadays), WIN32OLE.new fails with "HRESULT error code:0x80070057 / The parameter is incorrect."

I created a small assembly that demonstrates the problem. The assembly can be built using "dotnet build"  command.

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Bug #16116: ruby2.6.3(x86/x64)  use win32ole could not new Object, return 0x80070057
https://bugs.ruby-lang.org/issues/16116#change-93235

* Author: whdukewu (Kewu DU)
* Status: Closed
* Priority: Normal
* ruby -v: ruby 2.6.3p62 (2019-04-16 revision 67580) [i386-mingw32]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN
----------------------------------------
I build a RubyTest.dll by C#, In ruby2.2, I could use WIN32OLE.new to create ole object, but in the same system under ruby2.6.3, it failed to create ole object by WIN32OLE.new, is there any different between ruby 2.2 and ruby 2.6.3 in WIN32OLE?

OS: Win7 Profressional SP1 64bit

*/////// Ruby 2.6.3 use WIN32OLE failed to load dll //////////*
C:\Ruby26\bin>ruby -v
ruby 2.6.3p62 (2019-04-16 revision 67580) [i386-mingw32]

C:\Ruby26\bin>irb
irb(main):001:0> require 'win32ole'
=> true
irb(main):002:0> WIN32OLE.new('RubyTest.DllTest')
Traceback (most recent call last):
        6: from C:/Ruby26/bin/irb.cmd:31:in `<main>'
        5: from C:/Ruby26/bin/irb.cmd:31:in `load'
        4: from C:/Ruby26/lib/ruby/gems/2.6.0/gems/irb-1.0.0/exe/irb:11:in `<top (require
        3: from (irb):2
        2: from (irb):2:in `new'
        1: from (irb):2:in `initialize'
WIN32OLERuntimeError (failed to create WIN32OLE object from `RubyTest.DllTest')
**    HRESULT error code:0x80070057
      The parameter is incorrect.**
irb(main):003:0>



c:\TestTools\impeller\lib\Ruby\bin>ruby -v
ruby 2.2.6p396 (2016-11-15 revision 56800) [i386-mingw32]


*/////// Ruby 2.2 use WIN32OLE success load dll //////////*
c:\TestTools\impeller\lib\Ruby\bin>irb
irb(main):001:0> require 'win32ole'
=> true
irb(main):002:0> WIN32OLE.new('RubyTest.DllTest')
@@@DllTest Constructor
=> #<WIN32OLE:0x7418b68>
irb(main):003:0>

---Files--------------------------------
ClassLibraryForRuby.zip (1.55 KB)


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