There is a bug in the return value of the load method in ixmldomdocument.

In ixmldomdocumentLoadWhether the method return value has a bug

Ixmldomdocument Load When an XML file is returned, the returned value is inconsistent with the one described on msdn.
Msdn says:
Return values
S_ OK

The value returned if successful.

S_false

The value returned ifLoadFails.

E_invalidarg

The value returned if the issuccessful parameter is null.

I used this:

Coinitialize (null );
 IxmldomdocumentptrPdoc = NULL;
Hresult hR = pdoc. createinstance (_ uuidof (domdocument30 ));
If (! Succeeded (HR ))
{
Trace ("error: cannot create domdocument! \ N ");
Return-1;
}
HR = pdoc->Load(". \ Test. xml ");

Debugging successfulLoadThe HR value is-1.
LoadThe HR value is 0 in case of failure.
This is different from what msdn says.