using shell32 inside C++

Question

I am trying to use some code that uses the IID_IShellDispatch and CLSID_Shell constants.

My includes:

#include <Windows.h>
#include <WinDef.h>
#include <Shellapi.h>
#include <iostream>
#include <string>
#include <ShlDisp.h>
#include <Shlobj.h>

The code:

    BSTR source = SysAllocString(input.toStdWString().c_str());
    BSTR dest = SysAllocString(outputDirectory.toStdWString().c_str());
    HRESULT result;
    IShellDispatch *pISD;
    Folder *folder = NULL;
    VARIANT vDir, vFile, vOpt;

    CoInitialize(NULL);

    result = CoCreateInstance(CLSID_Shell, NULL, CLSCTX_INPROC_SERVER, IID_IShellDispatch, (void **)&pISD);
    ...

The last line above throws error about undefined reference to CLSID_Shell and IID_IShellDispatch

The code is part of a Qt project so I am using a Qt project file (for qmake) and I have added the -lshell32 into the LIBS section of it:

LIBS += -lshell32 -loleaut32 -lole32

Command executed is

g++ -Wl,-subsystem,windows -mthreads -o debug\wallch.exe object_script.wallch.Debug  -lglu32 -lopengl32 -lgdi32 -luser32 -lmingw32 -lqtmaind -lshell32 -loleaut32 -lole32 -LC:\Qt\Qt5.2.0\5.2.0\mingw48_32\lib -lQt5Widgetsd -lQt5Networkd -lQt5Guid -lQt5Cored

Using MinGW on win7

Answer 1

I had to download the windows SDK and add it to my options like this:

LIBS += -L"C:\Program Files\Microsoft SDKs\Windows\v7.1\Lib" -loleaut32 -lshell32 -luuid -lole32