title: Reading Ctrl + until found a non-digit from keyboard
body: <p>It's possible once <kbd>Ctrl</kbd> was pressed, get all keys pressed before until a non-digit was found? valid inputs: </p>
  
  <p><kbd>Ctrl</kbd> + <kbd>1</kbd> <code>// do something with 1</code></p>
  
  <p><kbd>Ctrl</kbd> + <kbd>2 </kbd> <code>// do something with 2</code></p>
  
  <p><code>//..</code></p>
  
  <p><kbd>Ctrl</kbd> + <kbd>30</kbd> <code>// do something with 30</code></p>
  
  <p>it's a will works as the <kbd>FN</kbd> keys, but instead of it, I wan to use <kbd>Ctrl</kbd> and extend the range from <code>0-9</code> to <code>0-50</code>. I hope this is clean. Thanks in advance.</p>
  
  <p>Note: I tagged <code>C#</code> and <code>C</code> languages because either of these languages is valid for my use case.</p>