two letters upon another for math symbols

[xlstatik]

How is it possible to get two letters at the same place?
I have to create math symbols with a dot or a dash on top of a letter.
I know I can get these symbols whith shapes, but that is cumbersomely.
I am looking for some deadkeys or a vba-macro.

 

[Gary''s Student]

Most mathematical symbols are already available in the fonts
symbol
wingding
wingding2
wingding3
and especially arial ms unicode

check out:
http://www.unicode.org/

 

[Jerry W. Lewis]

Also look at the equation editor

xbar is Alt-0214 in the Math Ext font from
http://www.columbia.edu/~em36/wpdos/wptoword.html
xbar is Alt-0120 in the MS Reference 1 font.

Jerry