Refreshing a form?

Hi everybody.
I've a list form A which has a field and this field is updated from another form B.
Form B is opened from a button in form A. I can't see the updated field with the new data in form A immediately when I modified the record in form B with some code like this:

Record.Field := New Value;
Record.MODIFY;

How can I achieve this?. Thanks,

PS: form A must be non editable, that's why i'm using form B to enter the new values of the field.