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  Registry;
procedure TForm2.FormCreate(Sender: TObject);
var
  i,len:integer;
  R:TRegistry;
  Str:WideString;//使用Unicode
begin
  Str := 'pop.126.com';
//  for   i:=0   to   len-1     do
//  begin
//    Buf[i]:=ord(Str[i+1]);
//  end;
  R:=TRegistry.Create;
  Try
    R.RootKey := HKEY_CURRENT_USER;
    if R.OpenKey('Software\test',True) then
      try
        R.WriteBinaryData('Display Name',Str[1],(Length(Str)+1(*加上串结束符$0000*))*sizeof(WideChar(*按宽字符计算字节数*)));
      finally
        R.CloseKey;
      end;
  Finally
    R.Free;
  End;
end;uses
  Registry;
procedure TForm2.FormCreate(Sender: TObject);
var
  i,len:integer;
  Buf:array   of   byte;
  R:TRegistry;
  Str:WideString;
begin
  Str := 'pop.126.com';
  len:=length(Str);
  SetLength(Buf,(len+1)*sizeof(WideChar));
  fillchar( Buf[0],Length(buf),0);
//  for   i:=0   to   len-1     do
//  begin
//    Buf[i]:=ord(Str[i+1]);
//  end;
  Move( Byte(Str[1]),Buf[0],len*sizeof(WideChar));
  R:=TRegistry.Create;
  Try
    R.RootKey := HKEY_CURRENT_USER;
    if R.OpenKey('Software\test',True) then
      try
        R.WriteBinaryData('Display Name',Buf[0],Length(Buf));
      finally
        R.CloseKey;
      end;
  Finally
    R.Free;
  End;
end;
function StrToMyHex(const S:string):string;
var
  i:Integer;
  len:Integer;
begin
  len:=Length(S);
  if len>0 then
  begin
    Result:=Format('hex:%s,00',[IntToHex(Ord(S[1]),2)]);
    for i:=2 to len do
    begin
      Result:=Format('%s,%s,00',[Result,IntToHex(Ord(S[i]),2)]);
    end;
    Result:=Result+',00,00';
  end
  else
    Result:='';
end;