Problem with internal DLL symbols in coverage report

I am trying to use NCover with NUnit to monitor code coverage on a Win32 dll written in C++. I can generate the report, but it is full of internal symbols that muddy the waters. A sample of the symbols that I am not interested in are as follows:

.cctor 100% Visits Line End Column End Document 1 870 870 0 0 f:\rtm\vctools\crt_bld\self_x86\crt\src\mstartup.cpp 1 871 871 0 0 f:\rtm\vctools\crt_bld\self_x86\crt\src\mstartup.cpp 1 872 872 0 0 f:\rtm\vctools\crt_bld\self_x86\crt\src\mstartup.cpp ?A0x49040904.??__E?_lock@AtExitLock@<CrtImplementationDetails>@@$$Q0V?$Handle@P$AAVObject@System@@@2@A@@YMXXZ 100% Visits Line End Column End Document 1 171 171 0 0 f:\rtm\vctools\crt_bld\self_x86\crt\src\msilexit.cpp

How can I filter this information out so that I only see the information on the classes that I create?

Thanks in advance for your help.

Gary