Go to Start>Programs>Accessories>System Tools>Character Map on any Windows based system for the codes for thousands of characters, symbols, signs, foreign language letters and accents, designs, all kinds of things. It's been there since at least back to Win 95, maybe before.
Some rely on using a different font so they may not work here where we have no choice. Try them in Word or whatever you have as a document program on your computer if they don't work here.