title: Convert hex str to decimal value in delphi
body: <p>I've got a problem to convert a string representation of an hex value in integer value with Delphi.</p>
  
  <p>for example: </p>
  
  <blockquote>
    <p>$FC75B6A9D025CB16 give me 802829546 when i use the function:</p>
  </blockquote>
  
  <pre><code>Abs(StrToInt64('$FC75B6A9D025CB16'))
  </code></pre>
  
  <p>but if i use the calc program from Windows, the result is: 18191647110290852630</p>
  
  <p>So my question is: who's right? me, or the calc?</p>
  
  <p>Does anybody already have this kind of problem?</p>