C++builder中使用ICS中的FTPCLIENT有关问题

C++builder中使用ICS中的FTPCLIENT问题
请问我连接上FTP以后是如何获取根目录的呢？如何切换目录？

C/C++ code

FtpClient1->HostName        = PMS_FtpLogin->EditHost->Text;        FtpClient1->Port            = StrToInt(PMS_FtpLogin->EditPort->Text);        if (PMS_FtpLogin->CheckBox1->Checked)        { //匿名            FtpClient1->UserName ="anonymouse";        }        else        {            FtpClient1->UserName =PMS_FtpLogin->EditUser->Text;        }        FtpClient1->Binary          = PMS_FtpLogin->cbBinary->Checked;        FtpClient1->DisplayFileFlag = PMS_FtpLogin->cbDisplay->Checked;        FtpClient1->PassWord        = PMS_FtpLogin->EditPass->Text;        FtpClient1->OnDisplay       = Display;        ExecuteCmd(FtpClient1->Connect, FtpClient1->ConnectAsync);