Please check this program I wrote.... https://www.lomcn.org/forum/showthread.php?51642-Spawn-Editor-Any-Use/page6
It exports the barrier layer and displays in a picture box. You will have to use either print screen or the snipping tool to get the image, but it will do the job. Otherwise, I have posted the full VB6 code for that project if you want to use it to make your own barrier fetching tool.
Read the documentation and the forum thread before using it, and back up your files just in case.