VC++ 利用MAPI实现在程序中调用默认的电子邮件程序发送EMAIL(可以添加附件)。

1.利用ShellExecute 可以条用默认邮件客户端，但不能发送带附件的邮件

mailto:用户账号@邮件服务器地址?subject=邮件主题＆body=邮件正文  
　　如：ShellExecute(handle, ‘open’, ‘ mailto:who@mail.neu.edu.cn？subject=Hello＆Body=This is a test’, nil, nil, SW_SHOWNORMAL);打开新邮件窗口，并自动填入收件人地址、邮件主题和邮件正文。若邮件正文包括多行文本，则必须在每行文本之间加入换行转义字符％0a。

转载:http://blog.csdn.net/hczhiyue/article/details/6974593

2.

转载:http://www.vckbase.com/index.php/wv/452.html

转载:http://blog.csdn.net/elcoteq983/article/details/7286560

 //必须包括 mapi.h 头文件
 #include "mapi.h"                     

  /* code 为非Unicode版本 */
 /*********************************************************************
  * 函数名称:CSendEMailDlg::OnSendMapi
  * 说明:  调用MAPI函数发送邮件。
  * 作者:  Geng
  * 时间 : 2003-04-22 20:08:30
 *********************************************************************/
 void CSendEMailDlg::OnSendMapi()
 {
         UpdateData(true);

         //装入MAPI32.DLL动态库
         HMODULE hMod = LoadLibrary("MAPI32.DLL");

         if (hMod == NULL)
         {
                //AfxMessageBox(AFX_IDP_FAILED_MAPI_LOAD);
                MessageBox(NULL,"加载失败","提示",MB_OK);
                return;
         }

         //获取发送邮件的函数地址
         ULONG (PASCAL *lpfnSendMail)(ULONG, ULONG, MapiMessage*, FLAGS, ULONG);
         (FARPROC&)lpfnSendMail = GetProcAddress(hMod, "MAPISendMail");

         if (lpfnSendMail == NULL)
         {
                AfxMessageBox(AFX_IDP_INVALID_MAPI_DLL);
                return;
         }

         int nFileCount = ;   //有多少个附件需要发送，在此我设置为1

         //分配内存保存附件信息 不能使用静态数组，因为不知道要发送附件的个数
         MapiFileDesc* pFileDesc = (MapiFileDesc*)malloc(sizeof(MapiFileDesc) * nFileCount);
         memset(pFileDesc,,sizeof(MapiFileDesc) * nFileCount);

         //分配内存保存附件文件路径
         TCHAR* pTchPath = (TCHAR*)malloc(MAX_PATH * nFileCount);

         CString szText;
         for(int i = ;i < nFileCount;i++)
         {
                TCHAR* p = pTchPath + MAX_PATH * i;
                m_list.GetText(i,szText);
                strcpy(p,szText);

                (pFileDesc + i)->nPosition = (ULONG)-;
                (pFileDesc + i)->lpszPathName = p;
                (pFileDesc + i)->lpszFileName = p;
         }

         //收件人结构信息
         MapiRecipDesc recip;
         memset(&recip,,sizeof(MapiRecipDesc));
         recip.lpszAddress      = xxx@.com;//收件人邮箱地址
         recip.ulRecipClass = MAPI_TO;

         //邮件结构信息
         MapiMessage message;
         memset(&message, , sizeof(message));
         message.nFileCount     = nFileCount;                         //文件个数
         message.lpFiles        = pFileDesc;                          //文件信息
         message.nRecipCount    = ;                                  //收件人个数
         message.lpRecips       = &recip;                             //收件人
         message.lpszSubject    = "hello";                         //主题
         message.lpszNoteText   = "This is test";              //正文内容

         //发送邮件
         int nError = lpfnSendMail(, ,&message, MAPI_LOGON_UI|MAPI_DIALOG, );

         if (nError != SUCCESS_SUCCESS && nError != MAPI_USER_ABORT
                        && nError != MAPI_E_LOGIN_FAILURE)
         {
               // AfxMessageBox(AFX_IDP_FAILED_MAPI_SEND);
              MessageBox(NULL,"发送失败","提示",MB_OK);
         }

         //不要忘了释放分配的内存
         free(pFileDesc);
         free(pTchPath);
         FreeLibrary(hMod);
 }

 /*Unidode 版本*/

 #include "mapi.h"
 #include <atlstr.h>

 std::string UnicodeToANSI(const wstring& wstr)
 {
     int unicodeLen = ::WideCharToMultiByte(CP_ACP,,wstr.c_str(),-,NULL,, NULL ,NULL);

     if(unicodeLen == ) return std::string("");

     char *pChar= new char[unicodeLen+];

     memset(pChar ,  , sizeof( char ) * (unicodeLen+));

     ::WideCharToMultiByte(CP_ACP,,wstr.c_str(),-,pChar,unicodeLen, NULL ,NULL);

     pChar[unicodeLen]=;

     string str = pChar;

     delete [] pChar;
     pChar=NULL;

     return str;
 }

 int main()
 {

         //装入MAPI32.DLL动态库
         HMODULE hMod = LoadLibrary(L"MAPI32.DLL");

         if (hMod == NULL)
         {

             return -;
         }

         //获取发送邮件的函数地址
         ULONG (PASCAL *lpfnSendMail)(ULONG, ULONG, MapiMessage*, FLAGS, ULONG);
         (FARPROC&)lpfnSendMail = GetProcAddress(hMod, "MAPISendMail");

         if (lpfnSendMail == NULL)
         {

             return -;
         }

         int nFileCount = ;   //有多少个附件需要发送

         //分配内存保存附件信息 不能使用静态数组，因为不知道要发送附件的个数
         MapiFileDesc* pFileDesc = (MapiFileDesc*)malloc(sizeof(MapiFileDesc) * nFileCount);
         memset(pFileDesc,,sizeof(MapiFileDesc) * nFileCount);

         //分配内存保存附件文件路径
         CHAR* pTchPath = (CHAR*)malloc(MAX_PATH * nFileCount);

         CString szText("C:\\ 网站.txt");

         for(int i = ;i < nFileCount;i++)
         {
             CHAR* p = pTchPath + MAX_PATH * i;

             string temp = UnicodeToANSI(szText.GetBuffer());
             strcpy   (p,temp.c_str());

             (pFileDesc + i)->nPosition = (ULONG)-;
             (pFileDesc + i)->lpszPathName = p;
             (pFileDesc + i)->lpszFileName = p;
         }

         //收件人结构信息
         MapiRecipDesc recip;
         memset(&recip,,sizeof(MapiRecipDesc));
         recip.lpszAddress      = "2xxxxxx1@qq.com";
         recip.ulRecipClass     = MAPI_TO;

         recip.lpszName          = "Your Name";

         //邮件结构信息
         MapiMessage message;
         memset(&message, , sizeof(message));
         message.nFileCount     = nFileCount;                         //文件个数
         message.lpFiles        = pFileDesc;                          //文件信息
         message.nRecipCount    = ;                                  //收件人个数
         message.lpRecips       = &recip;                             //收件人
         message.lpszSubject    = "hello";           //主题
         message.lpszNoteText   = "This is test";              //正文内容

         //发送邮件
         int nError = lpfnSendMail(, ,&message, MAPI_LOGON_UI|MAPI_DIALOG, );

         if (nError != SUCCESS_SUCCESS && nError != MAPI_USER_ABORT
             && nError != MAPI_E_LOGIN_FAILURE)
         {
            //错误提示信息
         }

         //不要忘了释放分配的内存
         free(pFileDesc);
         free(pTchPath);
         FreeLibrary(hMod);

     return ;
 }

转载:http://blog.csdn.net/ghz/article/details/13279

转载:http://blog.csdn.net/waterathena/article/details/3346395