Many thanks Shawn,

I found your post useful because it was the only reference I could find on
how to convert points to pixels.

Having found this, and consequently solved my problem, someone in this group
may be able to tell me why the problem exists in the first place...

I have a user form with 5 CheckBoxes arranged in a column. The top CheckBox
is an 'All' option called cbAll. The idea is that when a user clicks on cbAll
all the other CheckBoxes are set to the same value as cbAll. The other
CheckBoxes have 'Click' events that when set to False will also set cbAll to
False and when set to True will check the status of the CheckBoxes and set
cbAll to True if they all happen to be True.

Nice and straightforward methinks until I discover that the '_Click' event
behaves like a '_Change' event. Even though the CheckBoxes were not clicked
by the user the '_Click' events were running when the values were changed by
the cbAll code.

I now have a perfectly working 'work-around' but feel a bit miffed at having
to spend two days getting there.

I'll be happy to post my solution if anyone is interested.

Kind regards,
Nick.