Naomi,

You can pass a reference to the child form as a parameter, then you just call the Refresh() of said reference (the grid or the form, whichever you feel is best)

....

DoForm('frm_Ticket', m.loParameter, thisform)

And in the Init you copy the reference to a ticket's form, lets say ParentForm

* frm_ticket.init
....
this.ParentForm = toForm

* frm_ticket.Destroy
this.ParentForm = null

* And before releasing the form
this.ParentForm.Refresh()

Or some of variation of the above