On pages 109-110 of the Eggplant Reference manual there is a table of the escape sequences you will use for sending keys to the remote system. You will generally send these sequences using TypeText and occasionally TypeCommand – both of these commands are available on the toolbar in either Live or Capture modes.
Your examples would be coded like this:
TypeText “\cr\C” – control down + r + control up
" – the enter key
TypeText " " – the tab key
In our forthcoming maintenance release, we include support for the number pad keys, the Windows key and the Application key. These last two require a specially modified VNC server because while we can send these keys, no currently available servers respond to them.