To elobrate
1) I have a variable BSTR in my vb application, as to be returned
out,retval.
when this BSTR is to be returned from component at last stage it is equated
as BSTR B = _bstr_t.copy();
the call after returning from component crashes inside vb app.
same works fine if I use BSTR B = _bstr_t, but idally it should crash in
this scenerio.
3)use of mare _bstr_t inside a function crashes the application when is
tries to return to user.
If I use BSTR inside same application my function works fine.
I am taking care of each and every refrence counting and catching exceptions
too.
Thanks .
Amar.
please these scenerios are not reproducable every time.

-----Original Message-----
From: Distributed COM-Based Code [mailto:DCOMDISCUSS.MICROSOFT.COM]On
Behalf Of Brian Muth
Sent: Tuesday, March 12, 2002 11:04 PM
To: DCOMDISCUSS.MICROSOFT.COM
Subject: Re: Crashing of the _bstr_t

You have a bug in your program somewhere. I'm not convinced it has
anything to do with the _bstr_t call, but more likely with interface
counting. Are you returning an interface pointer anywhere?

Also, remember that _bstr_t can throw an exception. Are you catching
them?

You haven't provided enough information for us to go on.

>
> Hi All,
> Why do it heppen that _bstr_t crashes in the folowing scenerios:
> 1) It crashes If you use BSTR = _bstr_t.copy(), ideally it shouldn't
in
> this case
> 2) It doesn't crashes if you use BSTR = _bstr_t, it should crash in
this
> case.
> 3) If we have used _bstr_t inside a function for any reason, The
moment
> function returns at the closing curly brashes (even though function
> returns
> void)it crashes the application .
> These scenerios are not repeated everytime but are more likely to
occur.
> The crashed application takes you to a point in COMIP.H
>
> void _Release() throw()
> {
> if (m_pInterface != NULL) {
> m_pInterface->Release();
> }
> }
>

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