The design of the software is covered by copy right unless it is open sourced or is a very common interface. They would need to come up with their own design and way of solving the problem to have a solution that was not copyrighted.
Answer:
Because its only available to the host
Explanation:
Alt and tab to switch to open applications
Answer:
the visibility persists as long as both A and B exist.
Explanation:
Global visibility basically means that the visibility persists as long as both A and B exist. In programming global visibility signifies that the variable/data in question is visible from any context of the code. Meaning that it can be accessed and manipulated from any part of the code, even from within a function or another document. This makes it very easy to use and structure accordingly.