dwErrorCode = GetLastError();
if( FormatMessageA( FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, dwErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)szErrorString, _countof(szErrorString), NULL) == 0 )
sprintf_s(szErrorString, _countof(szErrorString), "Error code: %u", dwErrorCode);
dwErrorCode = GetLastError();
if( FormatMessageA( FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, dwErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)szErrorString, _countof(szErrorString), NULL) == 0 )
sprintf_s(szErrorString, _countof(szErrorString), "Error code: %u", dwErrorCode);