How do you evaluate for NULL in ADO

I am trying to retrieve the value of a field that could be NULL.  I do this by using the following call:

strcpy(string, (LPCSTR)(_bstr_t)pFields->GetItem(vtIndex)->Value);

My database allows fields to be NULL.  Therefore, unless I want to keep receiving an exception error, I need to check the value for NULL.  Problem is, I'm not sure how to do that.  

Can someone help?!?
kingservantAsked:
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ChizlCommented:
Looks like your doing a RecordSet loop.  I would suggest you try GetRows(-1) to get your data returned into a _variant_t array, then close your recordset.   Then your eval will be much simpler and your process time will be much faster.

I have an example of this up on:
http://www.chizl.com/dev/c++/

Let me know if you have any questions about it.
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ChizlCommented:
BTW.. About the NULL, try catch() is the solution, but still suggest using GetRows(-1).   The -1 is for all records.
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ChizlCommented:
hehe.. Post again..  If you go the way I suggest you would use this:

http://support.microsoft.com/default.aspx?scid=kb;EN-US;q229088
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kingservantAuthor Commented:
Out of all the people who have responded to me on this forum, you have got to be the best!  Thanks for your response, complete with code examples and links, I love it.  I'll grade your answer tomorrow after I get to work.  BTW, do you have any other suggestions I could make to my code to make it more efficient?
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kingservantAuthor Commented:
Thanks for you response.  You're the best!
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kingservantAuthor Commented:
Thanks for you response.  You're the best!
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