主要函数为:
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;


在change事件中输入代码:
procedure TForm1.Edit1Change(Sender: TObject);
var
i:integer;
hz:string;
begin
edit2.Text:='';
for i:=1 to length(edit1.text) div 2 do
begin
hz:=copy(edit1.Text,i*2-1,2);
edit2.Text:=edit2.Text+getpy(hz);
end;
end;

（出处：www.delphibbs.com）