Upload files from VB with WININET

Good day to all. I have a problem using WinInet to upload a file to a web server. I get error 87 when I try to execute HTTPsendRequesstEX. I'm using sendRequestEX as I need Async communications.

I have a valid internet File Handle and there are no permissions issues on the server (IIS is installed on my laptop).

Here is the code snippet:

**** START OF SNIPPET ****
hRequest = HttpOpenRequest(hConnect, "PUT", "/filer/test.txt", vbNullString, vbNullString, 0, INTERNET_FLAG_NO_CACHE_WRITE, 0)
Rem *** All GOOD to here. at this point I have a valid connection to the server.

' This is the way it Must be called.
'BOOL HttpSendRequestEx(
' HINTERNET hRequest, Handle returned by HttpOpenRequest.
' LPINTERNET_BUFFERS lpBuffersIn, Optional. Pointer to an INTERNET_BUFFERS structure
' LPINTERNET_BUFFERS lpBuffersOut, Optional. Pointer to an INTERNET_BUFFERS structure
' DWORD dwFlags, reserved and MUST be set to zero
' DWORD dwContext Application-defined context value
');

Status = HttpSendRequestEx(hRequest, IB, vbNull, 0, 0) ' THISS CAUSES THE ERROR
If Status = 0 Then ' HERE IS WHERE I CATCH THE ERROR
MsgBox ("HttpSendRequestEx Err: " & Err.LastDllError)
Unload Me
End
End If

**** END OF SNIPPET ****

I have already developed FILE DOWNLOAD code (which is extremely fass -> 80 mb in about 2 minutes). I need to have an UPLOAD FILE piece for a project that I am working on in house.

Any help would be greatly appreciated.

Thanks

Goomba
ps: please feel free to email me directly at: rgutery@mentorits.com

What is the description for error 87? You can write err.description in your msg box to get the text.

Actually Doug, you cannot use err.description, one has to use GETlastdLLerr. In any case, it means "Inbuffer (or the buffer you are using) is Unmanaged"

???