FtpGetCurrentDirectory()怎么不好使？

[cub]

char bb[MAX_PATH]="";
unsigned long bblong=MAX_PATH;
int num=0;
num=FtpGetCurrentDirectory(*phFtpConn,bb,&bblong);
CString cc;
cc.Format("当前路径：%s 取回字符数=%d",bb,num);
AfxMessageBox(cc);
登陆后执行上述代码结果当前路径为空，取回字符数为0
是怎么回事？

[guopo]

第一个参数是HINTERNET,不是指针。

[cub]

第一个参数的声明是：HINTERNET* phFtpConn;
*phFtpConn应该是一个HINTERNET变量阿

[qing_li73]

BOOL FtpGetCurrentDirectory(
IN HINTERNET hFtpSession,
OUT LPSTR lpszCurrentDirectory,
IN OUT LPDWORD lpdwCurrentDirectory
);

Retrieves the current directory for the specified FTP session.

Returns TRUE if successful, or FALSE otherwise. To get the specific error message, callGetLastError.
hFtpSession
Valid handle to an FTP session.
lpszCurrentDirectory
Address of a buffer that receives the current directory string, which specifies the absolute path to the current directory. The string is null terminated.
lpdwCurrentDirectory
Address of a variable that specifies the length, in characters, of the buffer for the current directory string. The buffer length must include room for a terminating null character. Using a length of MAX_PATH is sufficient for all paths. When the function returns, the variable receives the number of characters copied into the buffer.
If the lpszCurrentDirectory buffer is not large enough, lpdwCurrentDirectory receives the number of bytes required to retrieve the full, current directory name.

[cub]

MSDN我有，不用给我拷这东西，正面给解答错误原因，如何改正，谢谢

[guopo]

BOOL FtpGetCurrentDirectory(...);

[cub]

哦，不好意思，把返回值看错了
但是为什么当前路径是空的呢？