When i try to open *.pdf in web page using Shel.Explorer.2 it does not work

main_WEB = actxcontrol('Shell.Explorer.2' ,'Position',[650 120 1220 780],... 'Parent',ws_MainFigure); Navigate(main_WEB,'http://www.google.com/');

When I try to view a pdf using Shell.Explorer.2 it does not open or display *.pdf in window. I would at least like to have the option of open or save, but ideally i would like the pdf to open in window.

Thank you in advance