Can you turn on the /clr switch in the C++ compiler, then add the DLL as a reference?
You would then reference the namespace in the C++ code with "using namespace {name_goes_here};"
If you can (and do), you will probably need to change the default character set from Unicode to MultiByte.
Otherwise, you could start with information like this and possibly be able to get to the resources:
http://support.microsoft.com/kb/828736
or the library exporter :
thines01
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