HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

Currently, HD displays a message in a small window when visiting a Sanctuary only if there is text (i.e., the spell has not been learned). If the spell has been learned, a window with an image is displayed. In the text, you can highlight the spell name in yellow using {}. The string ""%s'%s'"" is located at address 0x677750, and it is used for all Sanctuaries and Pyramids. You can simply replace the single quotes with { and }.