Arduino .- Sloeber - Eclipse

Hello
I installed a new Windows 10 ( Get rid of all the Garbage)
and i Installed for Arduino Support the new Arduino Eclipse IDE - Windows Latest Stable
App and it works fine.
But I have a little Problem
I can't include Arduino.h
Without the include Arduino.h
Eclipse compiles it without warning or Error.
But it does not sound well for me.
What I'm missing ?

My Error
I forgot the Apostrophe
Stupid me sorry