LCD Control with Button

HI, I have plugged a 20x4 LCD(DotMatrix 20x4 blue), 3 buttons with the Arduino Atmega1280.

1.button to press the cursor move up and select the line 2.button to press the cursor move down and select the line 3. When will press 3.button the string contained in the selected line as a function called and executed. Is there function for it or i must to implement it new?

In advance I thank you and look forward to your feedback.

Greetings

Why don't you ask this guy: http://arduino.cc/forum/index.php/topic,56384.0.html