Border Fence Slovenia

My great-grand parents owned a house located on a border. It used to be Asutrian territory, when they left it more than 90 years ago, it had become Slovenia, later Yujoslavia, now it is located in Croatia – directly on the border, standing at the houses’s fences you have the big Slovenian border fence in front of you.
I followed their way, up to Styria, where they moved to – for them it was easy then, as it is for me now, but for others it has become impossible.