SysUtils.UpperCase、SysUtils.LowerCase 大小写转换

 

举例:

---

var
  ss,s: string;
begin
  ss := 'Delphi';
  s := UpperCase(ss);
  ShowMessage(s);  //DELPHI

  s := LowerCase(ss);
  ShowMessage(s);  //delphi
end;

---