pszFamilyname (PSZ)
Buffer provided by the application for passing the family name of the font. The font family name used by the application to select a font. When the first character in this string is NULL, no family name was initially selected, and the dialog defaults to the system font.
A buffer must be passed to the font dialog to allow the dialog to return the selected font family name. The size of this buffer is placed in the usFamilyBufLen field.