Re: How to pass variant (array of bytes) to winsock.ocx

From:
"Kurt" <junk@junk.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Fri, 9 Jun 2006 09:10:36 -0500
Message-ID:
<uIO7s68iGHA.1324@TK2MSFTNGP04.phx.gbl>
Why not use one of the MFC classes like CSocket instead of the winsock.ocx?

"mxa" <mxa@discussions.microsoft.com> wrote in message
news:AEDFF613-F746-4962-9533-46B3C2D42DEA@microsoft.com...

I'm attempting to use Winsock.ocx in a Visual Studio 6.0, C++ application
and
I have a question on how to pass variants to a winsock GetData function
defined as follows: GetData(VARIANT *data, const VARIANT &type, const
VARIANT
&maxLen).

I have no problems with other functions, but this particular function
never
returns if I make the call with the VARIANT *data defined as a byte array.

My question, is how would I go about getting the data as an Array of
Bytes?

What has worked is when I call the GetData as follows defining a BSTR
type:

void CWme_rwDlg::OnDataArrivalRxwfsock( long bytesTotal)
{
   COleVariant var, varType, varLth(bytesTotal)
   varType.iVal = VT_BSTR;
   varType.vt = VT_I2;
   GetData( &var, varType, varLth); // Winsock control getdata
function
   Cstring str = (BSTR) var.bstrVal;
   AfxMessageBox(str);
}

The above code works when sending a BSTR. However, I want to send an
array
of bytes and have attempted to the following:

void CWme_rwDlg::OnDataArrivalRxwfsock( long bytesTotal)
{
   COleVariant var, varType, varLth(bytesTotal)
   varType.iVal = VT_ARRAY | VT_I1);
   varType.vt = VT_I2;
   GetData( &var, varType, varLth); // Winsock control getdata
function
   AfxMessageBox("Get Data Succeeded");
}

The number of bytes transmitted matches the number of bytes received,
however when I call the GetData function, it never returns. I'm assuming
I'm defining something incorrectly and was wondering if someone can
provide
me with some advice?

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