[HELP] Keyboard commands ar not working in Arduino IDE

Hello everybody!

I having problems with my Arduino IDE, I’m trying to get my Arduino Leonardo to act as a HID keyboard but the Keyboard.begin and all other keyboard commands aren’t working.

Does anybody know how to help me out here?
Thanks in advanced!

Arduino: 1.6.7 (Windows 10), Board: "Arduino Leonardo"

C:\Users\user\Documents\Arduino\Leonardotest\Leonardotest.ino: In function 'void setup()':

Leonardotest:10: error: 'Keyboard' not found. Does your sketch include the line '#include <Keyboard.h>'?
 Keyboard.println("Hello World");


Leonardotest:15: error: 'KEY_BACKSPACE' was not declared in this scope



Leonardotest:17: error: expected ';' before 'Keyboard'



Leonardotest:19: error: a function-definition is not allowed here before '{' token

 void loop() {


Leonardotest:22: error: expected '}' at end of input



exit status 1
'Keyboard' not found. Does your sketch include the line '#include <Keyboard.h>'?

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'Keyboard' not found. Does your sketch include the line '#include <Keyboard.h>'?

Well, does it? If not, add it. If so, please post your sketch using code tags(</> button on the toolbar).