I have a maintenance form to modify a business object. The form also has a grid containing related child data which is wired up using binding etc.

All seems to work as expected apart from when editing values in the grid (the "child" records) the form's tool strip does not go into "edit mode". How can I get the MFTS to react to the child records in the grid / BO?

Also, for clarification: assuming I can get this working, what would the Undo button do to the child records? Would it undo all changes if I had changed multiple child record values in the grid or just the last row changed? I'm hoping the former...

Thanks in advance

...and there's no .SetEditingState() method and the .EditingState property is read only

How about I call .Edit() with the same effect:

if (childBO.IsDirty && parentBO.EditingState == BusinessEditingState.Idle)
    parentBO.Edit();

Yep, that would work, too.  I think the SetEditingState() was changed from Friend (internal) to public recently, and it might not be in the latest release, so calling Edit() would work just as well.