Convert const char* to wstring

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I recommend you using std::string instead of C-style strings (char*) wherever possible. You can create std::string object from const char* by simple passing it to its constructor.

Once you have std::string, you can create simple function that will convert std::string containing multi-byte UTF-8 characters to std::wstring containing UTF-16 encoded points (16bit representation of special characters from std::string).

There are more ways how to do that, here’s the way by using MultiByteToWideChar function:

std::wstring s2ws(const std::string& str)
{
    int size_needed = MultiByteToWideChar(CP_UTF8, 0, &str[0], (int)str.size(), NULL, 0);
    std::wstring wstrTo( size_needed, 0 );
    MultiByteToWideChar(CP_UTF8, 0, &str[0], (int)str.size(), &wstrTo[0], size_needed);
    return wstrTo;
}

Check these questions too:
Mapping multibyte characters to their unicode point representation
Why use MultiByteToWideCharArray to convert std::string to std::wstring?

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