Правильная конвертация string в LPCWSTR?

string s_Path = "путь";
LPCWSTR l_Path;
l_Path = (LPCWSTR)s_Path_vir.c_str();

wstring s_Path = L"путь";
LPCWSTR l_Path;
l_Path = (LPCWSTR)s_Path_vir.data();

std::wstring s_Path = L"путь";
LPCWSTR l_Path = s_Path.c_str();
MessageBoxW(hwnd, l_Path, L"Caption", MB_OK);

MessageBoxW(0, l_Path, LPCWSTR("Caption"), MB_OK);

#include <windows.h>
#include <vector>
#include <string>
 
BOOL AnsiToUnicode16(CHAR const *in_Src, WCHAR *out_Dst, INT in_MaxLen)
{
    /* locals */
    INT lv_Len;
 
    // do NOT decrease maxlen for the eos
    if (in_MaxLen <= 0)
        return FALSE;
 
    // let windows find out the meaning of ansi
    // - the SrcLen=-1 triggers MBTWC to add a eos to Dst and fails if MaxLen is too small.
    // - if SrcLen is specified then no eos is added
    // - if (SrcLen+1) is specified then the eos IS added
    lv_Len = MultiByteToWideChar(CP_ACP, 0, in_Src, -1, out_Dst, in_MaxLen);
 
    // validate
    if (lv_Len < 0)
        lv_Len = 0;
 
    // ensure eos, watch out for a full buffersize
    // - if the buffer is full without an eos then clear the output like MBTWC does
    //   in case of too small outputbuffer
    // - unfortunately there is no way to let MBTWC return shortened strings,
    //   if the outputbuffer is too small then it fails completely
    if (lv_Len < in_MaxLen)
        out_Dst[lv_Len] = 0;
    else if (out_Dst[in_MaxLen-1])
        out_Dst[0] = 0;
 
    // done
    return TRUE;
}
 
int main()
{
    std::string s_Path = "путь";
    std::vector<WCHAR> l_Path(s_Path.size() + 1);
 
    AnsiToUnicode16(s_Path.c_str(), &l_Path[0], l_Path.size());
 
    MessageBoxW(0, &l_Path[0], L"Debug", MB_OK);
}