LNK2019 Unresolved External Symbol SHGetFolderPathW
c++, lnk2019, qt
Solution
This is a Windows linker error caused by not including proper libraries during link. Read the documentation for the function at,
http://msdn.microsoft.com/en-us/library/windows/desktop/bb762181%28v=vs.85%29.aspx
then you see at the bottom that you have to include
Library: Shell32.lib
If you are using Qt, that would mean you have to add `LIBS += lshell32` to the Qt project file.
Problem
So, I've come across a strange error and I can't seem to find a solution for it. I'm writing this code on Qt Creator 3.1.1. The code is: ``` #include <ShlObj.h> #include <string> #include <vector> static std::wstring GetUserDirectory() { std::wstring returnPath; TCHAR path[MAX_PATH]; HRESULT hr = SHGetFolderPath(NULL, CSIDL_COMMON_DOCUMENTS, NULL, SHGFP_TYPE_CURRENT, path); if (hr == S_OK) { returnPath = path; return returnPath; } else { return NULL; } } ``` When I try to build the program, I get the following linking errors: error: LNK2019: unresolved external symbol __imp_SHGetFolderPathW referenced in function "public: static class std::basic_string,class std::allocator > __cdecl FileUtils::GetUserDirectory(void)" (?GetUserDirectory@FileUtils@@SA?AV?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@XZ) error: LNK1120: 1 unresolved externals I'm assuming that these errors are related to the above code because from what I understand, SHGetFolderPath is just a wrapper for SHGetFolderPathW. However, I'm not sure why I'm getting this error. Any help would be appreciated. Thanks,