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passing memory into INPROC com objects

Posted on 2002-04-13
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Last Modified: 2013-11-20

I have a COM object dll that needs to process extremely large amounts of data that come from an application (5 to 6megs at a time).  My question is, is there a way I can simply pass a pointer into the COM object and let it release the memory when its done or do I have to send the memory through the com interface in something like a massive safe array?
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Question by:Adept
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jhance earned 200 total points
ID: 6938683
With an in-process COM server you can certainly do this since both your client application and the COM server share the same memory space.  It's not a good technique, however, since it violates the structure of COM.

All data to/from COM should be passed via the COM interface.  Even a large block of data like you have can be done.  The VARIANT type supports arrays.

You may want to rethink your use of COM altogether if this is a big issue.
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by:Adept
ID: 6939931

when I instance memory in the app though and try to free it in the object I get major errors.  Is this supposed to happen?
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by:jhance
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Hmmmm, "major errors", that really narrows things down...

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