Thanks for reply. I know and from time to time also use Teamviewer, but its to slow for this use (thanks for the suggestion anyway). See this (https://www.youtube.com/watch?v=nEBw2Ryv9UQ)
video to see what I'm talking about. I would use this to enjoy 2 screens on powerful PC, rather than using slower notebook (with 2nd monitor attached via HDMI).