>Thanks, that did the trick
>But still I wonder why the difference. I always thought that the keyboard way of checking a box is the spacebar. There should not be a difference in behaviour. Could that be a bug?

Peter
It has to do with the fact that the current object has not lost its focus therefore the changed value has not been put into the bound field. I think its always worked like that. My save routine does a SetFocus to the current object to ensure that the field the user way typing into has its data placed into the underling bound field.