Delphi字符串简码

从网上找的三个函数自己修改了下，在delphi7运行正常，unicode的版本不能用好像

输入：1abc天天

输出：1ABCTT

unit UnitJM;

interface

uses SysUtils;

function getPY(hzchar: string): char;
function getStrPY(Astr: string): string;
function IsMBCSChar(const ch: Char): Boolean;

implementation

function IsMBCSChar(const ch: Char): Boolean;
begin
  Result := (ByteType(ch, 1) <> mbSingleByte);
end;

function getPY(hzchar: string): char;
begin
  case word(hzchar[1]) shl 8 + word(hzchar[2]) of
    $B0A1..$B0C4: result := 'A';
    $B0C5..$B2C0: result := 'B';
    $B2C1..$B4ED: result := 'C';
    $B4EE..$B6E9: result := 'D';
    $B6EA..$B7A1: result := 'E';
    $B7A2..$B8C0: result := 'F';
    $B8C1..$B9FD: result := 'G';
    $B9FE..$BBF6: result := 'H';
    $BBF7..$BFA5: result := 'J';
    $BFA6..$C0AB: result := 'K';
    $C0AC..$C2E7: result := 'L';
    $C2E8..$C4C2: result := 'M';
    $C4C3..$C5B5: result := 'N';
    $C5B6..$C5BD: result := 'O';
    $C5BE..$C6D9: result := 'P';
    $C6DA..$C8BA: result := 'Q';
    $C8BB..$C8F5: result := 'R';
    $C8F6..$CBF9: result := 'S';
    $CBFA..$CDD9: result := 'T';
    $CDDA..$CEF3: result := 'W';
    $CEF4..$D188: result := 'X';
    $D189..$D4D0: result := 'Y';
    $D4D1..$D7F9: result := 'Z';
  else
    RESULT := char(32);
  end;
end;
//==============================================================================
// 获取字符串的JM
//==============================================================================
function getStrPY(Astr: string): string;
var
  i: integer;
  hz, pyzh: string;
  Achar:Char;
begin
  result := '';
  i:=1;
  while i<(Length(Astr)+1) do
  begin
    aChar:=Astr[i];
    if IsMBCSChar(Achar) then
    begin
      hz := copy(Astr, i, 2);
      pyzh := pyzh + getpy(hz);
      Inc(i,2);
      Continue;
    end;
    pyzh:=pyzh+achar;
    Inc(i);
  end;
  result :=UpperCase(Pyzh);
end;
end.