ANPOP Developers Center > Using ANPOP in Visual C++

Retrieve Email in Visual C++

Important notice:* This product has integrated to EAGetMail POP3 Component, Please use EAGetMail POP3 Component instead of ANPOP POP3 Component.

Installation and Deployment

You should download the anpop installer and install it on your machine at first. If you want to distribute or deploy anpop without anpop installer, please click here to learn more.

C++ header files for ANPOP

All header files for C++ are located in "Include" sub-directory of ANPOP installation directory.

ANPOP.IDL //MIDL file for ANPOP, it was generated by OleView tool in Visual Studio.
 
ANPOP.H  // header file of ANPOP
ANPOP.i_c

ANPOP.tlh // header file for ANPOP SmartPointer
ANPOP.tli

Using ANPOP with COM interface

This sample demonstrates how to retrieve pop3 email in Visual C++ with COM interface.

#include <comdef.h>
#include "ANPOP.h"
#include "ANPOP_i.c"
						
//create pop3 connection object and messge object
IPOPMAIN* pConnection = NULL;
IPOPMSG* pMessage = NULL;

HRESULT hr = ::CoInitialize( NULL );
hr = ::CoCreateInstance( CLSID_POPMAIN,
		NULL,
		CLSCTX_ALL,
		IID_IPOPMAIN,
		(LPVOID*)&pConnection );
						
_ASSERT( SUCCEEDED( hr ) && pConnection != NULL );

hr = ::CoCreateInstance( CLSID_POPMSG,

		NULL,
		CLSCTX_ALL,
		IID_IPOPMSG,
		(LPVOID*)&pMessage );

_ASSERT( SUCCEEDED( hr ) && pMessage != NULL );

//Connect to pop3 email server
long lRet = 1;
pConnection->Connect( _bstr_t("pop3.control.com"), _bstr_t("Jack"),  
		_bstr_t("ja1234"), &lRet );
						
if( lRet == 0 )
{
//Get the total count of emails existing on POP3 server. 
  pConnection->GetTotalOfMails( &lRet );
  long lLen = lRet;
  for( int i = 0 ; i < lLen; i++ )
  {
    //Retrieve each email and save it to disk
    BSTR bstrOut = NULL;
    pConnection->Retrieve( i+1, &bstrOut );
    pMessage->put_RawContent( bstrOut );
    
    TCHAR szBuf[256];
    ::wsprintf( szBuf, "%s\\%d.eml", "c:\\", 
			i+1 );
			
    pMessage->ExportFile( _bstr_t( szBuf ), &lRet  );
    ::SysFreeString( bstrOut );
    bstrOut = NULL;
  }
}

pConnection->Close();
pConnection->Release();
pConnection = NULL;

pMessage->Release();
pMessage = NULL;
::CoUninitialize();

Using ANPOP with Smart Pointer

Be honest, using the raw COM interface in Visual C++ is boring. Smart Pointer makes programming life easier. The following code demonstrates how smart pointer facilitates your Visual C++ works.

#include <comdef.h>
#include <string>
#include <iostream>
#include <ANPOP.tlh>
using namespace std;
using namespace ANPOPLib;

VOID Retrieve( const char* lpszServer, 
               const char* lpszUser, 
               const char* lpszPassword )
{
  ::CoInitialize( NULL );
  
  IPOPMAINPtr	oPop3("ANPOP.POPMAIN");
  IPOPMSGPtr	oMsg("ANPOP.POPMSG");
  int i = 0, nCount = 0, nRet = 0, nSize = 0;
  _bstr_t emailContent = "", messageId = "";
  
  try
  {
    nRet = oPop3->Connect( _bstr_t(lpszServer), 
                            _bstr_t(lpszUser), 
                            _bstr_t(lpszPassword));
    if( nRet != 0 )
      throw string( "error with Connect" );
      
    nCount = oPop3->GetTotalOfMails(); //Get total count of emails
    if( nCount == -1 )
      throw string( "error with GetTotalOfMails" );
    else if( nCount == 0 )
      throw string( "no email" );
  
    for( i = 1; i <= nCount; i++ )
    {
      nSize = oPop3->GetMsgSize(i); //Get email size
      if( nSize == -1 )
        throw string( "error with GetMsgSize" );
    
      messageId = oPop3->GetMsgID(i); //Get message-id
      if( messageId == _bstr_t((BSTR)NULL))
        throw string( "error with GetMsgID" );
    
      emailContent = oPop3->Retrieve(i); //Retrieve email
      if( emailContent == _bstr_t((BSTR)NULL))
        throw string( "error with Retrieve" );
    
      oMsg->RawContent = emailContent;
      char szFile[MAX_PATH];
      memset( szFile, 0, sizeof(szFile));
      ::sprintf( szFile, "c:\\pop3Test_%d.eml", i );
      nRet = oMsg->ExportFile( _bstr_t(szFile)); //Save email
      if( nRet != 0 )
        throw string( "error with ExportFile" );
    
      if( oPop3->Delete(i)!= 0 ) //Delete email from server
        throw string( "error with Delete" );
    }
  }
  catch( string &e )
  {
    cout << e << endl;
  }		

  oPop3->Close();   //Close connection
  oPop3.Release();
  oMsg.Release();
  ::CoUninitialize();
}

Asynchronous mode and event driving

If you want to use POPMAIN in asynchronous mode, please refer to Pop3Sink.h of VCSAMPLE1 in ANPOP installation package. You just need to inherit from class CPop3Sink and override the event hanlder.

#include "Pop3Sink.h"

class CMyDlg: public CDialog, /*POPMAIN Events Handler*/CPop3Sink
{
....
protected:
  HRESULT __stdcall OnConnectedHandler();
  HRESULT __stdcall OnClosedHandler();
  HRESULT __stdcall OnErrorHandler( long lError, BSTR errDescription );
  HRESULT __stdcall OnGetTotalOfMailsHandler( long lCount );
  HRESULT __stdcall OnGetMsgIDHandler( BSTR messageId, long lMsg );
  HRESULT __stdcall OnReceivingHandler( long lBytes, long lMsg );
  HRESULT __stdcall OnReceivedHandler( BSTR emailContent, long lMsg );
  HRESULT __stdcall OnReceiveHandler( long lMsg );
  HRESULT __stdcall OnDeletedHandler( long lMsg );
  ...
}

Full Sample

Please refer to VCSAMPLE1 in ANPOP installation package.

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