Verify unique instance of application in WinApi (Visual Studio C++)

unique_app_instance_WinApi.cpp

int CALLBACK wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLine, int nCmdShow)
{
    // Avoid multiple instances of application
    const WCHAR *applicationMutexName = L"autorun_st";
    HANDLE mutexAppHandle = CreateMutex(NULL, TRUE, applicationMutexName);
    if (GetLastError() == ERROR_ALREADY_EXISTS) {
        CloseHandle(mutexAppHandle);
        return EXIT_FAILURE;
    }
    ...
}