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DLL Talk / Memblock ptr parameter in VC++ ?

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Kelebrindae
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Posted: 3rd Dec 2004 22:40 Edited at: 3rd Dec 2004 22:41
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Hi,

I've got some DB code which generates a memblock containing 100 bytes (a table of 100 characters, in fact).
And I want to send the memblock pointer to a function in a DLL I made in VC++6, to do some massive calculations on these bytes.

Can you tell me how to write the function declaration ?
(yeah, I know: noob question... )

Thanks a lot!

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IanM
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Posted: 5th Dec 2004 03:29
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Easy:

CALL DLL 1, "MyFunctionName", GET MEMBLOCK PTR(1)

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Kelebrindae
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Posted: 6th Dec 2004 16:24
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Thank you Ian, but my question was more about the VC++ side:
How to write the function declaration in VC++ so I can access to the datas stored in the memblock ?

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Kelebrindae
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Posted: 6th Dec 2004 23:31 Edited at: 6th Dec 2004 23:32
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Forget it, I've just figured it out.
My memblock contains only one type of datas (bytes). So, in VC++, I can use the memblock pointer as if it was a pointer to a char table, like this:

And then, in DB, you can read the memblock and get the datas that the VC code put in it. Easy, and powerful.

Hmmm, I think I'm gonna have fun with this...

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