public static extern int recvFileListByDateFramServer(string ip,
                                                       int port,
                                                       string path,
                                                       string beginDate,
                                                       string endDate,
                                                       FWndCallBackHandle callback);
 public static extern int recvFileListFramServer(string ip,
                                                 int port,
                                                 string path,
                                                 FWndCallBackHandle callback);
 public static extern int recvFileFramServer(string ip,
                                             int port,
                                             string RemotefileNamePath,
                                             string LocalDirPath,
                                             FWndCallBackHandle callback);
 public static extern int sendFileToServer(string ip,
                                           int port,
                                           string LocalfileNamePath,
                                           string RemoteDirPath,
                                           FWndCallBackHandle callback);
 public static extern bool delFileFramServer(string ip,
                                             int port,
                                             string RemoteFilePath,
                                             FWndCallBackHandle callback);
 public static extern bool createDirFramServer(string ip,
                                               int port,
                                               string RemoteDirPath,
                                               FWndCallBackHandle callback);