Two part question...

Part One......
How can I make sure the default font in Excel is used in my code instead of
one a user may have set as his default in Excel?

Part Two...
Using a normal default excel font how many characters do you suppose if I
were to put report comments in the header of the document I could do if I
add a .5 in the header (It is set to 1" if no comments are present). I am
having a little difficulty with figuring this out in test runs.