function CCIncluded(s : string): boolean;
var
i: integer;
begin
result:=false;
for i:=1 to Length(s) do
begin
if (ByteType(s, i) = mbLeadByte) or (ByteType(s, i) = mbTrailByte) then
begin
result:=true;
exit;
end;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
if CCIncluded(Edit1.Text) then
ShowMessage('含有中文');
end;