This function is missing after updating in C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\atlmfc\include\atlcore.h file: ////////////////////////////////////////////////////////////////////////////// // DLL Load Helper inline HMODULE AtlLoadSystemLibraryUsingFullPath(_In_z_ const WCHAR *pszLibrary) { WCHAR wszLoadPath[MAX_PATH+1]; if (::GetSystemDirectoryW(wszLoadPath, _countof(wszLoadPath)) == 0) { return NULL; } if (wszLoadPath[wcslen(wszLoadPath)-1] != L'\\') { if (wcscat_s(wszLoadPath, _countof(wszLoadPath), L"\\") != 0) { return NULL; } } if (wcscat_s(wszLoadPath, _countof(wszLoadPath), pszLibrary) != 0) { return NULL; } return(::LoadLibraryW(wszLoadPath)); } //////////////////////////////////////////////////////////////////////////////