title: How to replace a selected text in synedit?
body: <p>I'm doing a custom text editor in Delphi with SynEdit and i'm at a loss with a simple need:</p>
  <p>I want to have a popup button that, when clicked, replace the selected text with an uppercase version of that text. I think i have to use SelStart y SelEnd, but i'm not sure how can i do it.</p>
  <p>I went into google and find mentions of a &quot;La biblia de SynEdit&quot; but the links were dead, so i ended here, hoping for a helpful soul who can answer my questions or has a copy of that bible.</p>