The problem is next:
I developed the program that works with .pdf files.
So after program installation end-user has to see new item with subitems in context menu of every .pdf file. (only for .pdf files)
So in my installer I need to execute code (maybe script, maybe something else) that adds new menu item with submenus to right-click context menu of every .pdf file.
Can someone provide me with link or info what can I execute to add menu item with subitems to context menu of every .pdf file.