How to Add Form Code to a WordPress Post. HTML form code offers an easy way to insert form items -- text boxes, radio buttons and checkboxes, for example -- to your WordPress site.

With an understanding of the basic WordPress interface, you can add bullets with point-and-click commands. For more advanced users, some basic HTML code does the trick.

Also noteworthy is the ability to add HTML code to image captions, allowing users to stylistically format parts of the captions and add links.