C / C++ / MFC

<br />
typedef boost::shared_ptr<A> APtr;<br />
typedef std::map<int,APtr>   MyMap;<br />
<br />
m_mA[id] = APtr (new A);<br />

int __stdcall TestFunc(VARIANT var)
{
  // Check the variant type and contents
  if ((var.vt & VT_ARRAY) == 0)
    return E_INVALIDARG;
<br>
  if ((var.vt & VT_BSTR) == 0)
    return E_INVALIDARG;
<br>
  // OK, we have a safe array of BSTRs
  SAFEARRAY*	pSA = var.parray;
  BSTR*		bstrArray;
<br>
  // Lock the data
  SafeArrayAccessData(pSA, reinterpret_cast<void**>(&bstrArray));
<br>
  for (unsigned i = 0; i < pSA->rgsabound->cElements; i++)
  {
    // do something with bstrArray[i];
  }
<br>
  // Allow others to use it
  SafeArrayUnaccessData(pSA);
}

  // Generate the safe array for the data
  VARIANT		var;
  int		nSize = <size of array>;
<br>
  VariantInit(&var);
<br>
  var.vt = VT_ARRAY | VT_BSTR;
<br>
  SAFEARRAY*		pSA;
  SAFEARRAYBOUND	bounds = {nSize, 0};		// nSize items starting with index 0
<br>
  pSA = SafeArrayCreate(VT_BSTR, 1, &bounds);
<br>
  BSTR*	bstrArray;
<br>
  // Access the data and add the new items
  SafeArrayAccessData(pSA, reinterpret_cast<void**>(&bstrArray));
<br>
  for (int i = 0; i < nSize; i++)
  {
    // Set the element of bstrArray[i]
  }
<br>
  SafeArrayUnaccessData(pSA);
<br>
  var.parray = pSA;
<br>
  // Call TestFunc with var as parameter