thanks for your suggestion, your suggestion is true, but in my case the behaviour of displaying unicode hexadecimal numbers must be universal and applied to all the components of the form not just the label of a menu, while displayed correctly in submenus also displayed correctly on Labels and on Buttons even i do not specified the font. here is a picture of my case:
http://img159.imagevenue.com/img.php?image=51043_pic1_122_1022lo.JPG