I am working on a ATL COM project which will be used by both COM-based
clients and .NET clients.  One of the interface methods in the ATL project
returns a VARIANT.  Depending on the input to the method, the VARIANT may
contain a VT_BSTR, VT_I4, etc.  It also may return an array of bytes (
VT_ARRAY | VT_UI1 ).  For some reason, my COM-based clients (Visual Basic 6)
are quite happy receiving the array of bytes, but my .NET clients are
throwing a SafeArrayTypeMismatchException (Specified array was not of the
expected type).  The implementation looks something like the following.  Can
anyone see anything obvious I am doing wrong?

HRESULT CObject::GetData(VARIANT* value)
{
 // build the return array
 CComSafeArray<char> data;
 HRESULT hr = data.Create(10, 0);
 if (FAILED(hr)) return hr;

 ... code to populate array omitted ...

 // stuff the array into a VARIANT
 CComVariant returnValue;
 returnValue.vt = (VT_ARRAY | VT_UI1);
 returnValue.parray = data.Detach();
 return returnValue.Detach(value);
}

Thanks

Bimish