Managed forms - How are they supposed to work?

Hi,

Is there a good summary of how a managed form is supposed to work?

My understanding is that when a form is in Add mode and the Add button is clicked, that after adding the data to the database it switches to the OK mode automatically. Is this true? If so, what would prevent it from ending up in the OK mode?

I have UDF which is auto-managed. When I open the form, I have to transfer data into it from another form. This forces me to use code to put the form into Add mode. Could this screw up the management process?

Thanks,

Mike