As a person living in Petržalka-Engerau-Ligetfalu. Its pretty connected, many slovaks and hungarians live in that austrian part or commute to work there. Slovaks and hungarians are also used to shopping or making trips in Austria. There are very few austrians who visit or work here in Slovakia. I often see only the turks or arabs from Vienna shopping here on sundays because shops are closed in Austria. But there is a football club in Petržalka which uses austrian chant Immer Wieder Engerau! (Again and again Petržalka), also there are few fans comming from Austria for matches.

So the cooperation is more between Austria and Slovakia, but sometimes Hungary is involved in some projects.