[Bug 50280] New: DllSurrogate and mixing 32 and 64 bit COM components and applications does not work

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50280

Bug ID: 50280
           Summary: DllSurrogate and mixing 32 and 64 bit COM components
                    and applications does not work
           Product: Wine
           Version: 6.0-rc1
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ole32
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

I would rank this as lower priority, since many people dont even know you can
do it. I think you have many bigger fish to fry, but in case this is supported
or there is interest in it, here goes.

Consider this situation:

You run Ubunutu 64 bit. You install 32 and 64 bit wine. (sudo dpkg
--add-architecture i386)

You install your 64 bit application under wine which registers itself as a COM
server.

You install the windows script host: sudo winetricks wsh57

Now from wine you run: cscript test.vbs

Where test.vbs contains this:

Dim app
  Set app = CreateObject("My64BITApplication")

cscript will run as a 32 bit process and tell you the COM component is not
registered.

But the application added a DllSurrogate entry in the registry which under
Windows allows mixing of 32 and 64 bit versions of the application and cscript.
So under Windows the above works but not under wine.

How this works and what should happen is explained here:

https://www.mobilize.net/blog/call-64-bits-code-from-a-32bit-vb6-app

https://techtalk.gfi.com/32bit-object-64bit-environment/

https://jpsoft.com/forums/threads/using-a-32-bit-in-process-com-server-dll-f...

If you google it, there is a great deal of information about there and details
about setting something up.

Now if this is not implemented, I suspect it would be a major undertaking, and
as I said there are more worthy places to devote efforts, but then again wine
is so amazing and has so many major things implemented, like direct x etc.