I am a OCC newer and just build OCC successfully based on Mike's introduction "http://www.opencascade.org/org/forum/thread_14581/". Then I was able to build and run turorial. BUT, the OCC functions(ie,GCE2d_MakeSegment) cannot be stepped in. All library files and dlls have been created in "openCASCADE6.3.0\ros\win32\libd" and "openCASCADE6.3.0\ros\win32\bind". Also, the library directory has been added to VS. Can anyone give me a help?