Unicode questions

Question

1.)What is the difference between C# and Java Unicode ?
2.)Is C++ Unicode limited to only Windows applications ?
3.)Do i always have to add specific C++ package of code that differs from usual to be able to use Unicode in C++ ?
4.)What Unicode language is the most supported on all platforms ?
5.)Did Microsoft start this Unicode trend or are there any other older Unicode languages besides .NET and Java that supported Unicode from ground up ?

Answer 1

Unicode is not bound to a programming language. You might want to read this to clear things out.