To select a font, it is quite possible to use API functions that allow you to enumerate the installed fonts in the system and add them to your combo box. This work is automated by a specially created TKOLFontCombobox object from the EnhCombos package (by Boguslav Brandys, Poland).

Also, there is a package MHFontDialog (author D. Zharov aka Gandalf), designed to call the system font selection dialog.