this is something I've done.
protected void viewBiz_OnBeforeSave()
{
this.viewBiz.BasicForm.DataRow["emailRecipient"] = emailRecipient;
//emailRecipient -> should get email.
}
then go to BizForm Properties -> Notification e-mail ->To e-mail: -> insert this macro {%emailRecipient%}
the macros will get email that was saved in
emailRecipient field in bizForm,by this function -> viewBiz_OnBeforeSave()
I hope my explanation helps. If not clear please ask.