Text annotation with different Font type

How can i change text annotation font type like Bold/italic ?
How to apply different font like Arial , Sans_Serif to Text annotation run time ?

new method:
--Annotation.SetEditFont shall coming for beta version.

Can we have version details so we can check for that ?

next beta version:
--change some java codes.
--fixed an rendering issue for a special PDF file.
--add new method Annotation.SetEditFont() wihich pass DocFont object to this function.
if u are urgent. u can send mail to support to ask last package.

The new beta 3.6.1beta1 is online.

Document.DocFont dfont = m_doc.NewFontCID("DroidSansFallback", 1);
In Document class NewFontCID is return null.because this return alwyas 0. long ret = newFontCID(hand_val, font_name, style);
Didnt know why this always return 0.