Or type an o (small o). Make a several points smaller then the rest of the text and use baseline shift to lift it to the proper location.
Access to the "extended ANSI character set" in Windows can be done from the keyboard. Turn on the NUMLOCK, press the ALT-key, then type the four digit number of the character code. So for an é, for example, you type ALT-0233. Always use the numeric keyboard (numlock on) for the numbers. Typing character numbers won't work for this.
But if you want the easy way you can start CHARMAP.EXE which is a utility in your \WINDOWS\SYSTEM subdirectory and copy and paste the requisite symbol into your document. You'll find the extended Character Map applet in Start > Programs > Accessories > Character Map (in Win98 and later, add System Tools after Accessories). In CHARMAP.EXE if you click and hold any of the symbols, it'll zoom to better show it's look. When you click any symbol, its Alt number will show in the lower right box. Not all fonts have the same extended characters and some don't have any at all, so for accuracy, be sure to have the same font name in CHARMAP.EXE as you are using in your document.
This is the same for all Windows applications and has been since the start of Windows.