[Bug 38350] FTDI Vinculum II IDE V2.0.2-SP2 gets OLE Error 80020006 and exits, native msxml3 is workaround

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=38350

--- Comment #13 from Damjan Jovanovic  ---
Searching include/winerror.h for 80020006, this came up:

---snip---
#define DISP_E_UNKNOWNNAME                                
_HRESULT_TYPEDEF_(0x80020006)
---snip---

DISP_E_UNKNOWNNAME is only returned from a few places in dlls/msxml3, and
patching each place to log that it's returning it, immediately found where it's
coming from:

---snip---
static HRESULT WINAPI domelem_setAttributeNode(
    IXMLDOMElement *iface,
    IXMLDOMAttribute* attribute,
    IXMLDOMAttribute** old)
{
    ...
    /* adding xmlns attribute doesn't change a tree or existing namespace
definition */
    if (!wcscmp(nameW, xmlnsW))
    {
        SysFreeString(nameW);
        return DISP_E_UNKNOWNNAME;
    }
    ...
}
---snip---

The app is trying to set the "xmlns" attribute, which Wine explicitly checks
for and immediately fails with DISP_E_UNKNOWNNAME, for some strange reason.

Changing it to return S_OK instead there, got the app to start up, although I
think there are other msxml bugs during new project creation.

Now the real question is how to fix this properly.