The IRequest::get_Form method retrieves the Form collection of the Request object.
HRESULT get_Form(
IRequestDictionary ** ppDictReturn // pointer to an
// IRequestDictionary interface
// pointer that receives the Form collection
);
You can iterate through the Form collection with the get__NewEnum method exposed by the IRequestDictionary interface. You can also retrieve a specific Form value with the get_Item method.