set_font_face
/* 46 */ void (*set_font_face)(void* user, int32 flags);
set_font_face(fCurrentRun->font, B_BOLD_FACE, command->Option() != 0);
set_font_face(fCurrentRun->font, B_ITALIC_FACE, command->Option() != 0);
set_font_face(fCurrentRun->font, B_UNDERSCORE_FACE, command->Option() != 0);
set_font_face(fCurrentRun->font, B_STRIKEOUT_FACE, command->Option() != 0);
fCallbacks->set_font_face(fUserData, face);