When upgrading to Windows 10, is it necessary to get a revoke key?
Will there be a Visual Cobol Version for Visual Studio 2015 available?
I am not sure what is going to happen if you upgrade to Windows 10. I expect the up coming release of VC 2.3 to be supported on Windows 10, but as far as I know the current version 2.2 Update 2 has not been tested on Windows 10. I could be wrong, but I will get a confirmation.
As for Visual COBOL for Visual Studio 2015, this will be available in version 2.3.
I just got a note from someone in the product management stating that it is not recommended to upgrade to Windows 10 if you are still using the current version of VC (i.e. 2.2.2 and prior versions). In other words, it is recommended to wait for the release of 2.3 where you will need to uninstall VC, upgrade to Windows 10, and finally install 2.3.