std::to_wstring(int), _tow_s(int, wchar_t, 2 or 10);

wchar_t buffer[256] = {};

GetWindowText(g_tow_in, buffer, sizeof(buffer));
::TextOut(hdc, 100, 100, buffer, lstrlen(buffer));
int i_Value = _wtoi(buffer);
std::wstring temp_str = std::to_wstring(i_Value);
::TextOut(hdc, 200, 100, temp_str.c_str(), temp_str.size());



wchar_t buffer[256] = {};
GetWindowText(g_tow_in, buffer, sizeof(buffer));
::TextOut(hdc, 100, 100, buffer, lstrlen(buffer));
int i_Value = _wtoi(buffer);
_itow_s(i_Value, buffer, 10);
::TextOut(hdc, 200, 100, buffer, lstrlen(buffer));