THPDFUnicodeLineBreakKind
THPDFUnicodeLineBreakKind = (ulbkProhibited, ulbkAllowed, ulbkMandatory);
ulbkProhibited keeps neighboring text on the same line, ulbkAllowed provides an optional fitting point, and ulbkMandatory terminates the current line
Emergency grapheme wrapping is a higher-level fitting choice, and does not change the default opportunity reported by this enum