How can I make all of my buttons in a form to make its text to uppercase/lowercase?

How can I make all of my buttons in a form to make its text to
uppercase/lowercase?

References

Reference NO 1

http://stackoverflow.com/questions/4041022/convert-string-from-lowercase-to-uppercase-and-removing-special-charaters-from-a

Reference NO 2

http://answers.yahoo.com/question/index?qid=20080930093749AAVef2k

Reference NO 3

http://www.bigresource.com/VB-First-Letter-UpperCase-and-the-rest-LowerCase-in-Text-Box--kiQGnZ4OXJ.html

Reference NO 4

http://www.textfixer.com/tools/uppercase-lowercase-text.php

Reference NO 5

http://www.dummies.com/how-to/content/how-to-change-the-case-of-your-text-in-word-2007.html

Reference NO 6

http://www.mediacollege.com/internet/javascript/text/case-lowercase.html

Reference NO 7

http://forum.openoffice.org/en/forum/viewtopic.php?f=45&t=21813

Reference NO 8

http://www.ehow.com/how_4758069_text-vise-versa-microsoft-word.html