如何用MAPI和CDONTS来发邮件

不想另外安装第三方的发邮件组件，想直接利用MS的。

请问在VB里如何用MAPI来发送邮件（好像MAPI是OUTLOOK和OE自带有的吧），需要像在OE里发邮件一样先手工设置好发信帐号吗？能不能像JMAIL一样在发信时指定SMTP服务器及发信验证用户名和密码？

哪里有CDONTS发邮件的源码？我需要能指定发邮件的SMTP及认证用户名和密码的那个版本的，这就相当于JMAIL能实现的功能了，好像低版本的CDO不支持，汗~~~~~

下面是使用winsock实现的发送邮件，但其它问题仍未解决，等待高手

eSTMP.vbp
-------------------------------------------
Type=Exe
Object={248DD890-BB45-11CF-9ABC-0080C7E7B78D}#1.0#0; MSWINSCK.OCX
Form=frmmail.frm
Startup="Form1"
HelpFile=""
Title="Email发送"
ExeName32="Email.exe"
Command32=""
Name="Email"
HelpContextID="0"
CompatibleMode="0"
MajorVer=1
MinorVer=0
RevisionVer=0
AutoIncrementVer=0
ServerSupportFiles=0
VersionCompanyName="dapha.net"
VersionFileDescription="Email发送,支持服务器认证，超文本邮件内容"
VersionLegalCopyright="Copyright 2002 dapha.net"
VersionProductName="Email发送软件"
CompilationType=0
OptimizationType=0
FavorPentiumPro(tm)=0
CodeViewDebugInfo=0
NoAliasing=0
BoundsCheck=0
OverflowCheck=0
FlPointCheck=0
FDIVCheck=0
UnroundedFP=0
StartMode=0
Unattended=0
Retained=0
ThreadPerObject=0
MaxNumberOfThreads=1

[MS Transaction Server]
AutoRefresh=1

frmMail.frm
-----------------------------------------
VERSION 5.00
Object = "{248DD890-BB45-11CF-9ABC-0080C7E7B78D}#1.0#0"; "MSWINSCK.OCX"
Begin VB.Form Form1
   BorderStyle     =   1 Fixed Single
   Caption         =   "邮件发送程序(支持smtp服务器验证)"
   ClientHeight    =   5550
   ClientLeft      =   45
   ClientTop       =   330
   ClientWidth     =   5805
   LinkTopic       =   "Form1"
   MaxButton       =   0   False
   ScaleHeight     =   5550
   ScaleWidth      =   5805
   StartUpPosition =   3 Windows Default
   Begin MSWinsockLib.Winsock Winsock1
      Left            =   2640
      Top             =   2520
      _ExtentX        =   741
      _ExtentY        =   741
      _Version        =   393216
   End
   Begin VB.TextBox txtmessage1
      Height          =   1695
      Left            =   0
      MultiLine       =   -1 True
      TabIndex        =   8
      Text            =   "frmmail.frx":0000
      ToolTipText     =   "这里为超文本信件内容"
      Top             =   3480
      Width           =   5775
   End
   Begin VB.TextBox user
      Height          =   270
      Left            =   3960
      TabIndex        =   4
      Top             =   840
      Width           =   1575
   End
   Begin VB.TextBox subject
      Height          =   270
      Left            =   960
      TabIndex        =   3
      Text            =   "你好"
      Top             =   1320
      Width           =   2295
   End
   Begin VB.TextBox txtserver
      Height          =   270
      Left            =   960
      TabIndex        =   2
      Text            =   "smtp.etang.com"
      Top             =   960
      Width           =   2295
   End
   Begin VB.TextBox txtpwa
      Height          =   270
      IMEMode         =   3 DISABLE
      Left            =   3960
      PasswordChar    =   "*"
      TabIndex        =   5
      Top             =   1200
      Width           =   1575
   End
   Begin VB.TextBox getaddress
      Height          =   300
      Left            =   960
      TabIndex        =   1
      Top             =   600
      Width           =   2295
   End
   Begin VB.TextBox txtfrom
      Height          =   300
&n

补充：Web开发 , ASP.Net ,