The ATSUFontID type represents the unique identifier of a font to the font management system in ATSUI. You pass the ATSUFontID type with functions that set and obtain font information. The ATSUFontID type is passed back by functions that count fonts installed on a users's system. The ATSUFontID type can be also used to set and get the font in a style run; see Style Run Attribute Tag Constants.
typedef UInt32 ATSUFontID;
