说明：  FTP协议采用一系列简单的协议来完成文件传输的各种任务，在发送命令的时候，总是在命令的最后加上一个回车换行符，在VB中可以用“vbcrlf”来实现，vc中以“\r\n”表示。以下的命令是从Postel和Reynolds所著的RFC 929修改而来，如果读者想查看详细内容，可以参见英文版RFC 929。注意以下出现地标志符CRLF表示的是回车符号，即相当于VC中的“\r\n”。
(FTP protocol uses a series of simple file transfer protocol to complete the various tasks, in the send commands when the command is always the last to add a carriage return line feed in VB you can use " vbcrlf" to achieve, vc in order to " \ r \ n" , said. The following command is written by Postel and Reynolds modified from RFC 929, if readers want to see the details, you can see the English version of RFC 929. Note of the following occur in that the identifier CRLF carriage return symbols, which is equivalent to VC in the " \ r \ n" .)