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function boolean BlankString (
string ToCheck)
Description:
Returns true if the string is empty or contains only space characters.
Parameters:
ToCheck String to check.
external function boolean BlankString(string);

global
procedure OnApplicationStartup() 
begin
  string 255 tstr;
  
  tstr = "               ";
  if(BlankString(tstr)) then begin
    stopalert("blank");
  end;

  return;
end;
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