How to use arrow characters in winforms

I'm creating an excel add-in and i wanted to use up/down characters in a winforms form for a button's text. I tried using ˄ and ↑ and ▲. They all worked well on office 2010 (windows 7) but not on office 2007 (windows xp). 开发者_StackOverflow社区I'm obviously missing some basic understanding about the way these characters are used.

Any help would be welcome Thanks

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Windows XP has crummy fonts with poor support for unusual glyphs. Use the Charmap.exe applet on the target machine to find a font and a glyph that works. The poor man's choice is v and ^ (letter v and shift+6). An image is another solution. Ask more questions about this at superuser.com