请问,怎样可以实现在的程序自动发E-mail????
要求能点按扭后,不会弹出任何窗口,直接就在窗口上显示"正在发送"
然后就自动将"D:\A.TXT"发送到指定地址

并且要能附带附件的那种
高手来指教吧,不胜感激

unit SMTP_Connections;

//------------------------------------------
//定义单元
//---------------------------------------------
interface

uses
Classes, StdCtrls;

const
WinSock = 'wsock32.dll';
Internet = 2;
Stream = 1;
fIoNbRead = $4004667F;
WinSMTP = $0001;
LinuxSMTP = $0002;

type

TWSAData = packed record
wVersion: Word;
wHighVersion: Word;
szDescription: array[0..256] of Char;
szSystemStatus: array[0..128] of Char;
iMaxSockets: Word;
iMaxUdpDg: Word;
lpVendorInfo: PChar;
end;
PHost = ^THost;
THost = packed record
Name: PChar;
aliases: ^PChar;
addrtype: Smallint;
Length: Smallint;
addr: ^Pointer;
end;

TSockAddr = packed record
Family: Word;
Port: Word;
Addr: Longint;
Zeros: array[0..7] of Byte;
end;

function WSAStartup(Version:word; Var Data:TwsaData):integer; stdcall; far; external winsock;
function socket(Family,Kind,Protocol:integer):integer; stdcall; far; external winsock;
function shutdown(Socket,How:Integer):integer; stdcall; far; external winsock;
function closesocket(socket:Integer):integer; stdcall; far; external winsock;
function WSACleanup:integer; stdcall; far; external winsock;
function bind(Socket:Integer; Var SockAddr:TSockAddr; AddrLen:integer):integer; stdcall; far; external winsock;
function listen(socket,flags:Integer):integer; stdcall; far; external winsock;
function connect(socket:Integer; Var SockAddr:TSockAddr; AddrLen:integer):integer; stdcall; far; external winsock;
function accept(socket:Integer; Var SockAddr:TSockAddr; Var AddrLen:Integer):integer; stdcall; far; external winsock;
function WSAGetLastError:integer; stdcall; far; external winsock;
function recv(socket:integer; data:pchar; datalen,flags:integer):integer; stdcall; far; external winsock;
function send(socket:integer; var data; datalen,flags:integer):integer; stdcall; far; external winsock;
function gethostbyname(HostName:PChar):PHost; stdcall; far; external winsock;
function WSAIsBlocking:boolean; stdcall; far; external winsock;
function WSACancelBlockingCall:integer; stdcall; far; external winsock;
function ioctlsocket(socket:integer; cmd: Longint; var arg: longint): Integer; stdcall; far; external winsock;
function gethostname(name:pchar; size:integer):integer; stdcall; far; external winsock;

procedure _authSendMail(MailServer,uname,upass,mFrom,mFromName,mToName,Subject:string;mto,mbody:TStringList);
function ConnectServer(mhost:string;mport:integer):integer;
function ConnectServerwin(mhost:string;mport:integer):integer;
function DisConnectServer:integer;
function Stat: string;
function SendCommand(Command: String): string;
function SendData(Command: String): string;
function SendCommandWin(Command: String): string;
function ReadCommand: string;
function encryptB64(s:string):string;

var
mconnHandle: Integer;
mFin, mFOut: Textfile;
EofSock: Boolean;
mactive: Boolean;
mSMTPErrCode: Integer;
mSMTPErrText: string;
mMemo: TMemo;

implementation

uses
SysUtils, Sockets, IdBaseComponent,
IdCoder, IdCoder3to4, IdCoderMIME, IniFiles,Unit1;

var
mClient: TTcpClient;

procedure _authSendMail(MailServer, uname, upass, mFrom, mFromName,
mToName, Subject: string; mto, mbody: TStringList);
var
tmpstr: string;
cnt: Integer;
mstrlist: TStrings;
RecipientCount: Integer;
begin
if ConnectServerWin(Mailserver, 25) = 250 then
begin
Sendcommandwin('AUTH LOGIN ');
SendcommandWin(encryptB64(uname));
SendcommandWin(encryptB64(upass));
SendcommandWin('MAIL FROM: ' + mfrom);
for cnt := 0 to mto.Count - 1 do
SendcommandWin('RCPT TO: ' + mto[cnt]);
Sendcommandwin('DATA');
SendData('Subject: ' + Subject);
SendData('From: ' + mFromName + ' <' + mfrom + '>');
SendData('To: ' + mToName);
SendData('Mime-Version: 1.0');
SendData('Content-Type: multipart/related; boundary=Esales-Order;');
SendData(' type=text/html');
SendData(');
SendData('--Esales-Order');
SendData('Content-Type: text/html;');
SendData(' charset=iso-8859-9');
SendData('Content-Transfer-Encoding: QUOTED-PRINTABLE');
SendData(');
for cnt := 0 to mbody.Count - 1 do
SendData(mbody[cnt]);
Senddata(');
SendData('--Esales-Order--');
Senddata(' ');
mSMTPErrText := SendCommand(crlf + '.' + crlf);
try
mSMTPErrCode := StrToInt(Copy(mSMTPErrText, 1, 3));
except
end;
SendData('QUIT');
DisConnectServer;
end;
end;

function Stat: string;
var
s: string;
begin
s := ReadCommand;
Result := s;
end;

function EchoCommand(Command: string): string;
begin
SendCommand(Command);
Result := ReadCommand;
end;

function ReadCommand: string;
var
tmp: string;
begin
repeat
ReadLn(mfin, tmp);
if Assigned(mmemo) then
mmemo.Lines.Add(tmp);
until (Length(tmp) < 4) or (tmp[4] <> '-');
Result := tmp
end;

function SendData(Command: string): string;
begin
Writeln(mfout, Command);
end;

function SendCommand(Command: string): string;
begin
Writeln(mfout, Command);
Result := stat;
end;

function SendCommandWin(Command: string): string;
begin
Writeln(mfout, Command + #13);
Result := stat;
end;

function FillBlank(Source: string; number: Integer): string;
var
a: Integer;
begin
Result := ';
for a := Length(trim(Source)) to number do
Result := Result + ' ';
end;

function IpToLong(ip: string): Longint;
var
x, i: Byte;
ipx: array[0..3] of Byte;
v: Integer;
begin
Result := 0;
Longint(ipx) := 0;
i := 0;
for x := 1 to Length(ip) do
if ip[x] = '.' then
begin
Inc(i);
if i = 4 then Exit;
end
else
begin
if not (ip[x] in ['0'..'9']) then Exit;
v := ipx[i] * 10 + Ord(ip[x]) - Ord('0');
if v > 255 then Exit;
ipx[i] := v;
end;
Result := Longint(ipx);
end;

function HostToLong(AHost: string): Longint;
var
Host: PHost;
begin
Result := IpToLong(AHost);
if Result = 0 then
begin
Host := GetHostByName(PChar(AHost));
if Host <> nil then Result := Longint(Host^.Addr^^);
end;
end;

function LongToIp(Long: Longint): string;
var
ipx: array[0..3] of Byte;
i: Byte;
begin
Longint(ipx) := long;
Result := ';
for i := 0 to 3 do Result := Result + IntToStr(ipx[i]) + '.';
SetLength(Result, Length(Result) - 1);
end;

procedure Disconnect(Socket: Integer);
begin
ShutDown(Socket, 1);
CloseSocket(Socket);
end;

function CallServer(Server: string; Port: Word): Integer;
var
SockAddr: TSockAddr;
begin
Result := socket(Internet, Stream, 0);
if Result = -1 then Exit;
FillChar(SockAddr, SizeOf(SockAddr), 0);
SockAddr.Family := Internet;
SockAddr.Port := swap(Port);
SockAddr.Addr := HostToLong(Server);
if Connect(Result, SockAddr, SizeOf(SockAddr)) <> 0 then
begin
Disconnect(Result);
Result := -1;
end;
end;

function OutputSock(var F: TTextRec): Integer; far;
begin
if F.BufPos <> 0 then
begin
Send(F.Handle, F.BufPtr^, F.BufPos, 0);
F.BufPos := 0;
end;
Result := 0;
end;

function InputSock(var F: TTextRec): Integer; far;
var
Size: Longint;
begin
F.BufEnd := 0;
F.BufPos := 0;
Result := 0;
repeat
if (IoctlSocket(F.Handle, fIoNbRead, Size) < 0) then
begin
EofSock := True;
Exit;
end;
until (Size >= 0);
F.BufEnd := Recv(F.Handle, F.BufPtr, F.BufSize, 0);
EofSock := (F.Bufend = 0);
end;

function CloseSock(var F: TTextRec): Integer; far;
begin
Disconnect(F.Handle);
F.Handle := -1;
Result := 0;
end;

function OpenSock(var F: TTextRec): Integer; far;
begin
if F.Mode = fmInput then
begin
EofSock := False;
F.BufPos := 0;
F.BufEnd := 0;
F.InOutFunc := @InputSock;
F.FlushFunc := nil;
end
else
begin
F.Mode := fmOutput;
F.InOutFunc := @OutputSock;
F.FlushFunc := @OutputSock;
end;
F.CloseFunc := @CloseSock;
Result := 0;
end;

procedure AssignCrtSock(Socket:integer; Var Input,Output:TextFile);
begin
with TTextRec(Input) do
begin
Handle := Socket;
Mode := fmClosed;
BufSize := SizeOf(Buffer);
BufPtr := @Buffer;
OpenFunc := @OpenSock;
end;
with TTextRec(Output) do
begin
Handle := Socket;
Mode := fmClosed;
BufSize := SizeOf(Buffer);
BufPtr := @Buffer;
OpenFunc := @OpenSock;
end;
Reset(Input);
Rewrite(Output);
end;

function ConnectServer(mhost: string; mport: Integer): Integer;
var
tmp: string;
begin
mClient := TTcpClient.Create(nil);
mClient.RemoteHost := mhost;
mClient.RemotePort := IntToStr(mport);
mClient.Connect;
mconnhandle := callserver(mhost, mport);
if (mconnHandle<>-1) then
begin
AssignCrtSock(mconnHandle, mFin, MFout);
tmp := stat;
tmp := SendCommand('HELO bellona.com.tr');
if Copy(tmp, 1, 3) = '250' then
begin
Result := StrToInt(Copy(tmp, 1, 3));
end;
end;
end;

function ConnectServerWin(mhost: string; mport: Integer): Integer;
var
tmp: string;
begin
mClient := TTcpClient.Create(nil);
mClient.RemoteHost := mhost;
mClient.RemotePort := IntToStr(mport);
mClient.Connect;
mconnhandle := callserver(mhost, mport);
if (mconnHandle<>-1) then
begin
AssignCrtSock(mconnHandle, mFin, MFout);
tmp := stat;
tmp := SendCommandWin('HELO bellona.com.tr');
if Copy(tmp, 1, 3) = '250' then
begin
Result := StrToInt(Copy(tmp, 1, 3));
end;
end;
end;

function DisConnectServer: Integer;
begin
closesocket(mconnhandle);
mClient.Disconnect;
mclient.Free;
end;

function encryptB64(s: string): string;
var
hash1: TIdEncoderMIME;
p: string;
begin
if s <> ' then
begin
hash1 := TIdEncoderMIME.Create(nil);
p := hash1.Encode(s);
hash1.Free;
end;
Result := p;
end;

end.

//------------------------------------------
// 怎么使用定义好得相关单元
//---------------------------------------------
unit Unit1;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;

type
TForm1 = class(TForm)
Button1: TButton;
Memo1: TMemo;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

uses
SMTP_Connections;

procedure TForm1.Button1Click(Sender: TObject);
var
mto, mbody: TStringList;
MailServer, uname, upass, mFrom, mFromName,
mToName, Subject: string;
begin
mMemo := Memo1; // 定义相关发送服务器
//..........................
MailServer := 'mail.163.com';
uname := 'username';
upass := 'password';
mFrom := 'laolij@163.com;
mFromName := 'forename surname';
mToName := ';
Subject := 'Your Subject';
//..........................
mto := TStringList.Create;
mbody := TStringList.Create;
try
mto.Add('anybody@xyz.net');
mbody.Add('测试邮件');
//发送.................
_authSendMail(MailServer, uname, upass, mFrom, mFromName, mToName, Subject, mto, mbody);
//..........................
finally
mto.Free;
mbody.Free;
end;
end;

end.