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marshalling C++

Serve Laurijssen
10/23/2003 4:55:41 PM

inetserver asp components:

I have a function with the following signature

HRESULT func([in]BSTR id, [out, retval] VARIANT *retval);

The variant gets filled with a SAFEARRAY of IDispatch pointers, but COM
doesn't know that until after the function is run of course.
When I installed the components in the COM+ catalog it didn't work anymore,
probably because retval can't be marshalled correctly. Can somebody tell me
or give me a link on how to correctly marshal such a safe array of IDispatch
*?

Thanks in advance

Re: marshalling C++

Onega
10/24/2003 1:01:19 PM

See if marshal by value helps you out.
http://www.sellsbrothers.com/tools/mbvimpl.h

Here is an example in ATL Internals

class ATL_NO_VTABLE CDemagogue:
....
public IPersistStreamInitImpl2<CDemagogue>,
public CSupportDirtyBit,
public IMarshalByValueImpl<CDemagogue>
{
....
BEGIN_COM_MAP(CDemagogue)
COM_INTERFACE_ENTRY2(IPersist,IPersistStreamInit)
COM_INTERFACE_ENTRY(IPersistStreamInit)
COM_INTERFACE_ENTRY(IMarshal)
END_COM_MAP()
....
}

Best Regards
Onega

[quoted text, click to view]

Re: marshalling C++

Serve Lau
10/24/2003 8:21:04 PM

[quoted text, click to view]

Say, is that book still going strong if you use VS.NET 2003?

--
Looking for a C(99) compiler for windows?
Download lccwin32.
http://www.cs.virginia.edu/~lcc-win32/

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