function GetPYIndexString( ChString:string):string;
var
i:integer;
begin //根据一个汉字字符串取得拼音字头,不对汉字字符串做校验
if ChString = '' then
result:='';
for i:=1 to length(ChString) do
if (i mod 2) = 1 then
case WORD(ChString[i]) shl 8 + WORD(ChString[i+1]) of
$B0A1..$B0C4 : result := result+'A';
$B0C5..$B2C0 : result := result+'B';
$B2C1..$B4ED : result := result+'C';
$B4EE..$B6E9 : result := result+'D';
$B6EA..$B7A1 : result := result+'E';
$B7A2..$B8C0 : result := result+'F';
$B8C1..$B9FD : result := result+'G';
$B9FE..$BBF6 : result := result+'H';
$BBF7..$BFA5 : result := result+'J';
$BFA6..$C0AB : result := result+'K';
$C0AC..$C2E7 : result := result+'L';
$C2E8..$C4C2 : result := result+'M';
$C4C3..$C5B5 : result := result+'N';
$C5B6..$C5BD : result := result+'O';
$C5BE..$C6D9 : result := result+'P';
$C6DA..$C8BA : result := result+'Q';
$C8BB..$C8F5 : result := result+'R';
$C8F6..$CBF9 : result := result+'S';
$CBFA..$CDD9 : result := result+'T';
$CDDA..$CEF3 : result := result+'W';
$CEF4..$D188 : result := result+'X';
$D1B9..$D4D0 : result := result+'Y';
$D4D1..$D7F9 : result := result+'Z';
end;
end;