Changing browser settings

 You can modify browser settings by using Windows Registry Editor e.g.
  
system("echo Windows Registry Editor Version 5.00 > useragent.reg") 
system("echo. >> useragent.reg")     
system("echo [HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\5.0\\User Agent] >> useragent.reg")
system("echo \"Compatible\"=\"Testclient\" >> useragent.reg")      system("regedit /s useragent.reg")   
system("del /f useragent.reg")