Useing PhpMailer code inside of a function

Hi My name is Rick

I am trying to change the default server mail default with, PHPMailer
with no luck, but it does work on a page by itelf, I am trying to
replace this below, which is inside a function, and when I add the
phpmailer code I get errors, can someone let me how to use this along
with global variables? I could really use the help PHPMailer seems
way better then default.

once I get this, and understand it a bit more, I will replace the default in all
php scripts.

@mail($email, $sub, $msg, GetConfig('msgheaders')); works

PHP:

I need to find a way to use PHPMailer inside a function like above

$mail = new PHPMailer(); //works by itself on another page

$mail->IsSMTP(); // set mailer to use SMTP
$mail->Host = "relay-hosting.secureserver.net"; // specify main and backup server
$mail->SMTPAuth = false;     // turn on SMTP authentication
$mail->Username = "username";  // SMTP username
$mail->Password = "password"; // SMTP password

$mail->From = "test1@gmail.com";
$mail->FromName = "Testing PHPMailer";

$mail->AddAddress("test@gmail.com");

$mail->IsHTML(true);

$mail->Subject = "Test message body";
$mail->Body    = "Test <b>html</b>";
$mail->AltBody = "Test Text";

if(!$mail->Send())

PHP:

 

Place the contents within a function, read up user defined functions.