[TYPO3-english] Using image function in user functions

[Tapio Markula]

Hi

I would like to use image manipulation in user function.
I got information that I should use something like $this->cObj->IMAGE()


lets presume this in TS Template
includeLibs.hsme_string = fileadmin/ext-templates/user_myreplace.inc
tt_content.text.20 {
  parseFunc {
  userFunc=user_myreplace->user_myreplace
  }
  }
}

In order to use $this->cObj->IMAGE() should I first include the basic 
class and then make instance like this?

<?php
require_once ( PATH_site . 
'typo3/sysext/cms/tslib/class.tslib_content.php' );
class user_myreplace {
var $cObj;
function user_myreplace ($content="",$conf=array()) {
        $this->cObj = t3lib_div::makeInstance('tslib_cObj');
        $image=$this->cObj->IMAGE($conf);
...
       return $this->content;
}
}
?>

should I have
require_once(PATH_tslib."class.tslib_pibase.php");