ushort  StringGetCharacter(
   string  string_value,     // string
   int     pos               // symbol position in the string
   );

void OnStart()
  {
//--- delete all comments on the chart
   Comment("");
//--- declare a string, from which we will obtain the values of symbol codes and remember the string length
   string message = "The script demonstrates the operation of the StringGetCharacter() function";
   int    length  = StringLen(message);
//--- declare a string variable, to which we will add the obtained symbols from the demo string
   string text    = "";
//--- in the loop by the demo string length
   for(int i=0; i<length; i++)
     {
      //--- wait 1/10 seconds
      Sleep(100);
      //--- get a symbol from a string located at the loop index in the demo string
      ushort char_code=StringGetCharacter(message, i);
      //--- add a symbol to the displayed string and display the resulting string as a chart comment
      text+=ShortToString(char_code);
      Comment(text);
     }
//--- wait two seconds and remove the comment from the chart
   Sleep(2000);
   Comment("");

   /*
   Result: the demo string appears on the screen character by character
   The script demonstrates the operation of the StringGetCharacter() function
   */
  }