How to extract and append path in C using wchar_t*

I want to extract the path from GetModuleFileNameW and then to appen开发者_开发问答d "\hello.dll" to it (Without making "\\\\"). How to do that? (I'm not good with Unicode functions)

Assuming you're really working with paths, use the PathAppendW function. Note that you do this by appending "hello.dll" -- the backslash will be added if required by PathAppendW.

Alternately, you could write your own function pretty easily. Here's an example I threw together in 5 minutes in terms of std::wstrings

std::wstring PathAppend(const std::wstring& lhs, const std::wstring& rhs)
{
    if (lhs.empty())
    {
        return rhs;
    }
    else if (rhs.empty())
    {
        return lhs;
    }
    std::wstring result(lhs);
    if (*lhs.rbegin() == L'\\')
    {
        result.append(rhs.begin() + (rhs[0] == L'\\'), rhs.end());
    }
    else
    {
        if (rhs[0] != L'\\')
        {
            result.push_back(L'\\');
        }
        result.append(rhs);
    }
    return result;
}