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procedure Ascii2Ansi(var s: string);
var
  s0: string;
begin
  Setlength(s0,length(s));
  if (length(s0)>0) then
    OemToChar(Pchar(s),PChar(s0));
  s:=s0;
end;
procedure Ansi2Ascii(var s: string);
var s0: string;
begin
  Setlength(s0,length(s));
  if length(s0)>0 then
    CharToOem(Pchar(s),Pchar(s0));
  s:=s0;
end;