Using Show with vbModeless parameter I can change chart which I try to
modify.
How can I refresh my userForm to show parameters current chart (e.i.
size). Of course, it is possible to use button which loads up the
settings for the currently selected shape and displays them. But I need
to do it automatically, without button. Maybe API can help to do it but
I didn't find out any examples.
Can you help me?

Greg