That code looks pretty close. I think you still need to write
some kind of marker in there to indicate when a string doesn't
exist; otherwise, it will be ambiguous when you try to read
the record. I usually solve this by writing an empty string
if the string's pointer is NULL. And anyway, even though that
is a problem, it shouldn't prevent you from writing the record.

What error are you getting and when? Have you tried single-stepping
in the debugger to see where it fails?


yes,I tried single-stepping in the debugger and the fails only is that i can't 
write data into database;

thanks!
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