How can i effective forward message to another model?

[ValeriusGC]

Wolud you be so kind to give me receipt how can i do next:
When DataModel finishes some work i'd like to instantiate and send Message from another one, i.e. HistoryCreateMsg from HistoryModel.

So which the right approach?

DataModel
-> DataCreateMsg
–> HistoryCreateMsg 

HistoryModel
* HistoryCreateMsg

[ValeriusGC]

Well, that was a Brain Blowing..... 0_o
Widget with ProgramWidget must be visible at the moment one send messages to it!