FtpGetFileSize

Hi Guys,
So my problem is, how do I implement FtpGetFileSize from the wininet.dll.. i'll write down real quick what i have till now:

Private Declare Function FtpGetFileSize Lib "wininet.dll"_ Alias "FtpGetFileSize" (ByVal hFtpSession As Integer, ByVal_ lpszRemoteFile As String) As Integer

and thats how i want to get the filesize:

Dim size As Integer
size = FtpGetFileSize(hSession, "ftp.zip")
MsgBox(size)

But as soon as i get the size i'm just getting a "-1", but i know, that this file exists..
i can you also show what i found on microsofts page, which is kind a encrypted for my knowledge:

DWORD FtpGetFileSize(
HINTERNET hFile,
LPDWORD lpdwFileSizeHigh
);

Parameters
hFile
[in] HINTERNET handle returned from a call to FtpOpenFile.
lpdwFileSizeHigh
[out] Pointer to the high-order unsigned long integer of the file size of the requested FTP resource.
Return Values
Returns the low-order unsigned long integer of the file size of the requested FTP resource.

so please,if somebody can help me, either answer here or contact me through email: Morpheus@myghf.de

Thanks, I really appreciate your help, guys!!