Solution:
I'm sorry this is clearly not a psql-odbc issue. However, I wanted to follow up with a solution in case someone searches and finds my post.
I corrected the problem by setting the Target CPU to "x86".
In VS2008, go to Project->Project Properties...->Compile->Advanced Compile Options...->Target CPU: and set it to "x86". Works fine.
Charles S. Henkel
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