At 10.31 15/10/2008 -0700, you wrote:
[EMAIL PROTECTED] wrote:
> Hi all,
> I still have some problems with my server.
>
> I have a function that should return three parameters defined as:
>
> HRESULT GetInfo([out] BSTR *name, [out] BSTR *version, [out] BSTR
> *description);
>
> If I return a tuple with three string I get an error saying that the
number
> of returned parameters is wrong (3 in place of 4). I read this post
> http://markmail.org/message/rjpdosrliyne65fd
> and added a fourth parameter as first one with a 0 value (OK).
> I'm not sure this is a right solution and I'd like to ask if something has
> changed from that post.
>
>I would think this is fairly clear. Your function returns four things:
an HRESULT and three strings. That's what your tuple needs to contain.
I was not sure since in the post I read:
"After adding an HRESULT as the first element of the returned tuple, I found
that the *last* element of the returned tuple was being used as the
function's return value instead of the *first* value (or second after the
HRESULT?) as expected."
I cannot test the actual values I get, but I need to solve the second
problem (below).
> Unfortunately I cannot test if the values returned are good since after
that
> call I get another call to another function that raise an exception.
> The other function is defined as
>
> HRESULT func2([out] IEnumString ** param1);
>
> I can creat an object that implement IEnumString and return it but after
> that I get a QueryInterface on it with iid set to IID_NULL (a list of 0s).
>
>Again, this function returns two things: an HRESULT and an interface.
Are you returning a two-tuple?
Looking at the code in universal.py (at the end of the file) I understand
that HRESULT is mandatory only if you are returning a tuple of results,
otherwise if you are returning a single result there's no problem. I tried
both methods and it seems ok.
The problem is that after having returned the object I get a call (on the
object) to QueryInterface with IID_NULL. I received the piece of code that
calls this but there's nothing strange:
CComPtr<IEnumString> e;
result = t->func2(&e);
and
BSTR ret_str = NULL;
er = e->Next(1, &ret_str, &fetched);
For the Python object I tried both with a class that expose IEnumString
interface and with util.ListEnumerator passing pythoncom.IID_IEnumString. I
get the same result, the object is correct, the QueryInterface with
IID_IEnumString is served and after that the last QueryInterface that I
don't know where it comes from.
During the weekend I will try to build a small client in C++ and verify it.
Thanks anyway,
Enrico
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