Re: Beginner's problem

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#1393

From: Jim Melsom
Date: Wed, 10 Nov 1999 00:00

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Jim Melsom wrote:
> This is the problem: as soon as the TClientDataset's Active property is
> set to true, the following error occurs:
> "src->QueryInterface(GetIID(),(LPVOID*)(&intf)). No such interface
> exists ..."

I see this same thing was asked and answered earlier and is caused by
the code generated (or not generated) when exporting a TProvider.
Casting the return value of  get_<aprovider> to IProvider* works around
it. Kind of a tricky gotcha for newbies but once again it shows how
helpful these newsgroups are.

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From: Jim Melsom <jmelsom@uniserve.com>
Subject: Re: Beginner's problem
Date: 1999/11/10
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