枚举桌面应用程序lnk路径并得到对应程序的绝对路径（使用SHGetDesktopFolder函数枚举，然后使用COM查询IShellFolder，IShellLink和IPersistFile接口）

// 枚举桌面上应用程序的lnk路径
void EnumDesktopLnkPath()
{
    WCHAR szPath[MAX_PATH] = {0};
    SHGetSpecialFolderPathW(NULL, szPath, CSIDL_DESKTOPDIRECTORY, 0);

    IShellFolder* pShell = NULL;
    if(FAILED(SHGetDesktopFolder(&pShell)))
    {
        return ;
    }
    IShellFolder* pFolder = NULL;
    ITEMIDLIST* pItem = NULL;
    if(FAILED(pShell->ParseDisplayName(NULL, NULL, szPath, NULL, &pItem, NULL)))
    {
        return ;
    }
    if(FAILED(pShell->BindToObject(pItem, NULL, IID_IShellFolder, (LPVOID*)&pFolder)))
    {
        return ;
    }
    pShell->Release();

    if(NULL == pFolder)
    {
        return ;
    }

    IEnumIDList* pEnum = NULL;
    if(FAILED(pFolder->EnumObjects(NULL, SHCONTF_NONFOLDERS, &pEnum)))
    {
        return ;
    }
    pItem = NULL;
    ULONG ulFetched = 0;

    WCHAR szLnkPath[MAX_PATH] = {0};
    WCHAR szLnkName[MAX_PATH] = {0};
    LPCWSTR pszLnkName(L".lnk");

    WIN32_FIND_DATAW fd = {0};
    while(S_OK == pEnum->Next(1, &pItem, &ulFetched))
    {

        SHGetDataFromIDListW(pFolder, pItem, SHGDFIL_FINDDATA, &fd, sizeof(fd));
        swprintf(szLnkName, L"%s", fd.cFileName);
        if(0 == wcscmp(wcsrchr(szLnkName, L'.'), pszLnkName))
        {
            swprintf(szLnkPath, L"%s//%s", szPath, szLnkName);
            AfxMessageBox(CString(szLnkPath));
            //ParseLnk2Path(szLnkPath);
        }
    }
    pEnum->Release();
    pFolder->Release();
}

// 由程序的Lnk路径得到对应的绝对路径
BOOL ParseLnk2Path(LPCWSTR pszLnkName)
{
    ::CoInitialize(NULL);
    IShellLink* pShell = NULL;
    IPersistFile* pFile = NULL;
    if(S_OK == ::CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER, IID_IShellLink, (LPVOID*)&pShell))
    {
        if(S_OK == pShell->QueryInterface(IID_IPersistFile, (LPVOID*)&pFile))
        {
            pFile->Load(pszLnkName, STGM_READWRITE);
            TCHAR szPath[MAX_PATH] = {0};
            pShell->GetPath(szPath, MAX_PATH, NULL, SLGP_UNCPRIORITY);
            AfxMessageBox(CString(szPath));
        }

    }
    pShell->Release();
    pFile->Release();
    ::CoUninitialize();
    return TRUE;
}

http://blog.csdn.net/visualeleven/article/details/6433330