Can anyone tell me if this is the correct usage of the new string functions?
//(lpalp is basically just an object that is a struct that contains a
_TCHAR* and its length)

size_t destlen = (size_t)lpalp->maxbufferlen;
_TCHAR username[TEXTLIMIT + 1], password[TEXTLIMIT + 1];
UINT uLenUsername = GetDlgItemText(hWnd, IDC_USERNAME, username, TEXTLIMIT),
uLenPassword = GetDlgItemText(hWnd, IDC_PASSWORD, password, TEXTLIMIT);

#if _MSC_VER >= 1400
     _tcscpy_s(lpalp->buffer, destlen, _T("User ID="));
     _tcsncat_s(lpalp->buffer, destlen, username, (size_t)uLenUsername);
     _tcscat_s(lpalp->buffer, destlen, _T(";Password="));
     _tcsncat_s(lpalp->buffer, destlen, password, uLenPassword);
#else
     long charsleft = lpalp->maxbufferlen - 1;
     _tcsncpy(lpalp->buffer, U_PREFIX, charsleft); charsleft -=
_tcslen(U_PREFIX);
     _tcsncat(lpalp->buffer, username, charsleft); charsleft -=
uLenUsername;
     _tcsncat(lpalp->buffer, P_PREFIX, charsleft); charsleft -=
_tcslen(P_PREFIX);
     _tcsncat(lpalp->buffer, password, charsleft);
#endif

Have I got it right by this?