How to know if native method is safe / unsafe?

Question

I implement this function : GetSystemPowerStatusEx & GetSystemPowerStatusEx2

according to this article on MSDN, I should create a class named according to the fu

Answer 1

Put them inside the class you are going to use them as a static methods, then wrap around them with normal methods so you won't bother the rest of the application with the notion that there is something extern involved.

I use that approach and it never fails.

EDIT:

Check this out:

http://pinvoke.net/search.aspx?search=GetSystemPowerStatusEx