Adds new FreeText annotation on the current page.
type
THPDFFreeTextAnnotationJust = ( ftLeftJust, ftCenter, ftRightJust );
Delphi 語法：
procedure AddFreeTextAnnotation ( Contents: AnsiString; Rectangle: TRect; Quadding: THPDFFreeTextAnnotationJust; Color: TColor = clRed );
C++ 語法：
void __fastcall AddFreeTextAnnotation ( AnsiString Contents, Windows::TRect &Rectangle, THPDFFreeTextAnnotationJust Quadding, Graphics::TColor Color );
說明
使用 AddFreeTextAnnotation 在目前頁面加入新的 FreeText annotation，並指定 text message（Contents）、rectangle area（Rectangle）、justification（Quadding）與 color
數值意義
ftLeftJust Left justification.
ftCenter Center justification.
ftRightJust Right justification.
