LOCKSCREEN?

>Hi all,
>
>I don't know what to call this, but it's an old problem that I have really known the absolute cause for it so I am not sure what to look for.
>
>Basically I have a parent form that looks ok what it starts up. Opens a child form but after closing the child form, the child form's buttons and grid lines are sort of 'left behind' in that you can still see them there messing up the parent form. I have tried ThisForm.Refresh() and doesn't help. What should I look for? There is a aspecific sequence of events I have to follow in order to re-create it but it is re-creatable nevertheless.
>
>Any ideas please?
>
>Thanks