说明：  To write a managed event sink, you must link to the PIA that contains the necessary interfaces and implement the interfaces that correspond to the events that need to be handled. Optionally, you can link to the assembly that contains the easier-to-use wrappers for these interfaces. The following example illustrates how to write a managed SMTP event sink in CSharp that handles inbound commands. Use this type of sink to handle inbound SMTP commands and messages, and to process them as needed.
(To write a managed event sink. you must link to the PIA that contains the necess Indigenous interfaces and implement the interfaces th at correspond to the events that need to be handl ed. Optionally, you can link to the assembly that contains the ea sier-to-use wrappers for these interfaces. Th e following example illustrates how to write a m Managed SMTP event sink in that handles in CSharp bound commands. Use this type of sink to handle i nbound SMTP commands and messages. and to process them as needed.)