arduino & max/msp connection

Hi,
I'd like using button in arduino to control audio in Max/msp, I just runing the following code but it show " 'button' does not name a type. can someone help me resolve this problem? T~T

#include <Button.h>

int buttonPin = 2;
int ledPin = 13;

Button button = Button(buttonPin,BUTTON_PULLUP_INTERNAL);

void setup()
{
Serial.begin(9600);
digitalWrite (ledPin, LOW);
}

void loop() {

while(1) {

if(button.isPressed()){
digitalWrite(ledPin,HIGH);
Serial.println("1");
} else {
digitalWrite(ledPin,LOW);
Serial.println("0");
}
}

delay(100);

}

Hello,

Guess you need to install "Button.h" library to be able to run this sketch. Seems that this library doesnt come with Arduino by default.

See:
http://playground.arduino.cc/Code/Button
and