Sets or retrieves the MIME encoding for the form.
HRESULT value = object.put_encoding( v);HRESULT value = object.get_encoding(* p);
the format of the data being submitted by the form.
Microsoft Internet Explorer 4.0 also recognizes multipart/form-data, which, along with a POST method, is required to submit a file upload to the server.
Build date: 11/17/2013