给你一个吧:
function GetPYIndexChar(hzchar: string): String;
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';
$CEF4..$D1B8: result := 'X'; $D1B9..$D4D0: result := 'Y';
$D4D1..$D7F9: result := 'Z'; else result := '';
end;
end;