The ISessionObject::get_Value method retrieves the value of a variable stored in the Session object.
HRESULT get_Value(
  BSTR bstrValue, //binary string that contains the variable name
  VARIANT * pvar  //pointer to a VARIANT that receives the variable 
                  // value
);
 You can store values in the Session object. Information stored in the Session object is available throughout the session and has session scope.