Can develop OPC on XPE?

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I developped OPC client in XPE, but i can not get the item value. The same project, it can run in professional XP.

// Instantiate a new IKDataSink20:
m_pIDataSink20 = new IKDataSink20 ();

// Add ourselves to its reference count:
m_pIDataSink20->AddRef ();

// Advise the server of our data sink:
hr = pCP->Advise (m_pIDataSink20,

The hr value always wrong. Can you tell me the reason?

For the professional XP and XPE, we registered the same opc dlls, but different result!

Posted 29-Jul-10 16:16pm

Member 4391335

Updated 29-Jul-10 19:35pm

Sandeep Mewara

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Sandeep Mewara 30-Jul-10 1:36am

Use PRE tags to format code part. It makes the question readable.

Richard MacCutchan 30-Jul-10 6:48am

Take a look at http://www.systemtools.com/board/Forum13/HTML/000025.html for some suggestions. It would appear to be a permissions problem.

Member 4391335 2-Aug-10 6:58am

I read the article, but the problem can not be soloved. Can you give me some advice, i am really confused.
Thank you very much!

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Richard MacCutchan · Accepted Answer · 2010-07-29T23:20:00

Solution 1

Check the value of hr on return, that should tell you what is wrong. Unfortunately we cannot guess what it might be.

Posted 29-Jul-10 23:20pm

Richard MacCutchan

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Member 4391335 30-Jul-10 5:54am

the return value is 0x80070005 = Access is denied. I donot know is there some difference between XPE and professional XP. I heard that they are normally same.