This problem only occurs with Visual Studio 2003. (The solution is described below) It does not occur with Visual Studio 2002, 2005, or 2008.
Problem:
Your application will get an unresolved external error message if it tries to use any Chilkat method involving wchar_t, such as:
MfcLinkTest error LNK2019: unresolved external symbol "public: wchar_t const * __thiscall CkString::getUnicode(void)const " (?getUnicode@CkString@@QBEPB_WXZ) referenced in function "public: __thiscall CMainFrame::CMainFrame(void)" (??0CMainFrame@@QAE@XZ)
Solution:
Open the Project/Properties and select the "C/C++" tab. Then select the "Language" sub-category. The "Treat wchar_t as Built-in Type" property defaults to "Yes". This should be changed to "No".
Setting the "Treat wchar_t as Built-in Type" project property equal to "No" solves the unresolved external problem.
