To draw in the pdf using pen tool in acrobat reader x

hi im using the app.execMenuItem("Annots:Tool:InkMenuItem"); in the javascript of textbox in acrobat pro 9. When i click the text box pen tool is activated and im able to sign in that textbox.

But in acrobat reader 10.1.2 when i click the textbox its not working . i.e (app.execMenuItem("Annots:Tool:InkMenuItem"); ) is not executing . Is there any other command to get pen tool in acroabat reader x.