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

Kurt,

Thanks very much for your correct suggestion of using vbbyte = 17. I
incorrectly used varType.iVal=(VT_ARRAY|VT_I1) where the correct value is
varType.iVal=(VT_ARRAY | VT_UI1) which is the same as varType.iVal=(8192 |
17). I knew it was something simple that I was overlooking. In case anyone
was interested, here is the test routine I used (no error checking shown) to
display the received text:

void CWme_rwDlg::OnDataArrivalRxwfsock( long bytesTotal )
{
    COleVariant var, varType, varMaxLen(bytesTotal);
    VariantInit(&varType);
    VariantInit(&var);
    varType.iVal = (VT_ARRAY | VT_UI1);
    varType.vt = VT_I2;
    
    m_rxwfsock.GetData( &var, varType, varMaxLen); // read the data

    usigned long = nbytes = var.parray->rgsabound[0].cElements; // bytes rcvd
    BYTE *pbuf = new BYTE[nbytes+1]; // create a buffer for
bytes
    void *prbuf;
    SafeArrayAccessData(var.parray, &prbuf); // get pointer to rcv
buffer
    memcpy(pbuf, prbuf, nbytes);
    SafeArrayUnaccessData(var.parray);
    pbuf[nbytes] = NULL; // add term null
    CString str;
    str.Format("Rcvd data: %s", pbuf);
    AfxMessageBox(str); // display the message
    delete pbuf;
}

It's funny because after all this, I probably will use the CAsyncSocket
rather then the winsock.ocx. I hate all this variant stuff and the
suggestions to use CAsyncSocket seems like the better choice.

Thanks again Kurt and Joseph for the responses and help.

Monty
     
   
  
    

"Kurt" wrote: