在执行该操作前，程序必须测试授权：当前用户是否允许执行该操作？
Before executing that operation, the program must test for authorization: is the current user allowed to do the operation?
对于OmniFind，连接器会记住加密的登录凭证，并在每一次操作前登录。
For OmniFind, our connector simply remembers the encrypted logon credentials and logs in before each operation.
使用这些操作前，需要提供一个值和将要进行操作的位掩码，如清单 4 所示。
You provide a value and the bitmask upon which the operation is to be performed, as shown in Listing 4.
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