There are two easy ways of creating events in EventGhost.

First by commandline:

C:\Program Files\EventGhost\EventGhost.exe -E MyTestEventFromCmd
C:\Program Files\EventGhost\EventGhost.exe -E MyTestEventFromCmd WithPayload

And then via VBScript

Dim oEventGhost
Set oEventGhost = CreateObject("EventGhost")
oEventGhost.TriggerEvent "MyTestEvent"
oEventGhost.TriggerEvent "AndSomeOtherEvent", "WithPayload"
Set oEventGhost = Nothing

With that you can get EventGhost to react on loads of stuff… why not react on incoming phonecalls?