int n_args = 0;
int i;
LPWSTR *args = CommandLineToArgvW(GetCommandLineW(), &n_args);
if (args)
{
    if (n_args >= 2)
    {
        for (i = 1; i < n_args; i++)
        {
            std::cout << args[i] << "n";
            if (args[i] == L"/D") // <-- here
            {
                std::cout << "Condition metn";
            }
        }
    }
}

if (wcscmp(L"/D", args[i]) == 0)
{