How to assign a fixed IP-address to Arduino ethernet shield

Hi there,

I'm working on a school project and now I have to test Arduino Ethernet Connection using a local site in XAMPP. As there's no DHCP involved I have to assign a fixed IP-adress to Arduino. How do I have to do that.
My example code is:

#include <SPI.h>
#include <Ethernet.h>

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
char serverName[] = "search.google.com";

EthernetClient client;

int result;

void setup ()
{
  Serial.begin(9600);
  if(Ethernet.begin(mac) ==0)
  {Serial.println("DHCP-Konfiguration fehlgeschlagen");
  while(true)
   ;
  }
  delay(1000);
  
  Serial.println("Verbindung wird hergestellt...");
}

void loop()

{
  if(client.connect(serverName, 80)>0)
  {
    Serial.println("Die Verbindung wurde erfolgreich hergestellt.");
    client.println("GET /search?q=600+km+in+Meilen HTTP/1.0");
    client.println();
  }
  else 
  {Serial.println("That's an error. That's all we know.");
  }
  if(client.connected())
  {if(client.find("="))
  {result = client.parseInt();
  Serial.print("600 km sind" );
  Serial.print(result);
  Serial.println(" Meilen");
  }
  }
  else
    Serial.println("Kein Ergebnis gefunden");
    client.stop();
    delay(1000);
}

It would be great if someone could tell me where I have to implement those settings - or even better if someone could do that for me.

Thanks in advance.

Yours
Dominik