title: delphi insert text into textfile at specific point
body: <p>i want to edit a textfile. if i read a special line (let us say //--begin editing text here--//) then after this line i want to insert several lines but i don't want to override existing lines. is this possible with delphi? thanks!</p>
  
  <p><strong>sample text:</strong></p>
  
  <p>this <p>
  is a file<p>
  with text in it<p>
  //--begin inserting text here--//<p>
  and nothing in between<p></p>
  
  <p><strong>sample text after edit:</strong></p>
  
  <p>this<p>
  is a file<p>
  with text in it<p>
  //--begin inserting text here--//<p>
  now there is something<p>
  in between<p>
  and nothing in between<p></p>