What I wanted is to add a button to the toolvar but have just discovered it is already there.
I can now click the button "Open active file in external program" then click on chrome. That is good enough for me. So we have reached what I wanted, thanks for all your help. -- <https://forum.pspad.com/read.php?2,75193,75283> PSPad freeware editor https://www.pspad.com