>Manipulation of an application programmaticaly through alternative means(ie. sendkeys and sendmessage) requires writing code specifically for that application and generally is not best practice.
>
>What is your actual intent?

Certain fragment is selected in a book(grid) ( certain ActiveX is used to show books ). On right mouse click shortcut menu "Send as email" and then default email program is activated having generated HTML in its body. I have already HTML copying into clipboard which means after activating email program somehow, CTRL+V or Paste do the same thing and probably I should leave that as is.