Hi everyone: I tried to include .hxx file into my program. I got a lot of error messages. One of errors is like MainFrm.obj : error LNK2001: unresolved external symbol "public: static void * __cdecl Standard::MAllocate(int)" (?MAllocate@Standard@@SAPAXH@Z). Is anyone can tell me what going on is? Does it relate with Project setting? Compared the setting in my program and 09_SampleImportExport is same. I think I may lose something before I start to include .hxx file. Thank you.