nsIFactory Interface

 Creates an instance of a component.

 @param aOuter Pointer to a component that wishes to be aggregated
               in the resulting instance. This will be nsnull if no
               aggregation is requested.
 @param iid    The IID of the interface being requested in
               the component which is being currently created.
 @param result [out] Pointer to the newly created instance, if successful.
 @return NS_OK - Component successfully created and the interface 
                 being requested was successfully returned in result.
         NS_NOINTERFACE - Interface not accessible.
         NS_ERROR_NO_AGGREGATION - if an 'outer' object is supplied, but the
                                   component is not aggregatable.
         NS_ERROR* - Method failure.

void createInstance(in nsISupports aOuter, in nsIIDRef iid, [retval, iid_is(iid)] out nsQIResult result)

 LockFactory provides the client a way to keep the component
 in memory until it is finished with it. The client can call
 LockFactory(PR_TRUE) to lock the factory and LockFactory(PR_FALSE)
 to release the factory.	 

 @param lock - Must be PR_TRUE or PR_FALSE
 @return NS_OK - If the lock operation was successful.
         NS_ERROR* - Method failure.

void lockFactory(in PRBool lock)