Q140337: PC MAPI: Sample C++ Code to Read Mail Messages

Article: Q140337
Product(s): Microsoft Mail For PC Networks
Version(s): WINDOWS:3.0,3.2,3.5
Operating System(s): 
Keyword(s): 
Last Modified: 29-OCT-1999

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The information in this article applies to:

- Microsoft Mail for PC Networks, versions 3.0, 3.2, 3.5 
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SUMMARY
=======

The simple Messaging Application Programming Interface (MAPI) includes a
function that allows developers to access a user's mail messages
programmatically. The following code illustrates one way that this can be done
using Microsoft Visual C++ version 1.5 or another C compiler.

MORE INFORMATION
================

NOTE: The following code implements MAPI.DLL as a static library.

  /* readmail.c  */ 

  #include <stdio.h>
  #include <stdlib.h>
  #include <windows.h>
  #include <mapi.h>
  #include <string.h>

  int readmail();

  long err;
  LHANDLE lhSession;
  lpMapiMessage FAR *lppMessage;
  lpMapiMessage lpMessage;
  char szSeedMessageID[512];
  char szMessageID[512];
  char szTmp[4096];
  char szTmp2[50];

  LPSTR lpszSeedMessageID=&szSeedMessageID[0];
  LPSTR lpszMessageID=&szMessageID[0];

  int main()
  {
   readmail();
   return(0);
  }

  int readmail()
  {

    /************  Logon  **********************/ 
    err = MAPILogon(0L, "", "", MAPI_LOGON_UI, 0L,
    &lhSession);
    if(err != SUCCESS_SUCCESS)
    {
       MessageBox(0, "Error logging on", "Error", MB_OK);
       return(0);
    }

   /********* Find Messages ********************/ 
   *lpszSeedMessageID = '\0';

    // reset MAPIFindNext back to the top again
    err = MAPIFindNext(lhSession, 0L, "IPM.Microsoft Mail.Note",
    lpszSeedMessageID, 0L, 0L, lpszMessageID);
       if(err != SUCCESS_SUCCESS)
      {
        MessageBox(0, "Error finding first message", "Error",
        MB_OK);
        err = MAPILogoff(lhSession, 0L, 0L, 0L);
        return(0);

      }

    do
    {
      lppMessage=(lpMapiMessage FAR *) &lpMessage;
      /******** Read Message *************/ 
      err = MAPIReadMail(lhSession, 0L, lpszMessageID,
      MAPI_PEEK, 0L, lppMessage);
      if(err != SUCCESS_SUCCESS)
      {
        MessageBox(0, "Error during message read", "Error",
        MB_OK);
        err = MAPILogoff(lhSession, 0L, 0L, 0L);
        return(0);
      }
        /******* copy Subject and NoteText into string *************/ 
        if((lpMessage->lpszSubject) != NULL){
          _fstrcpy(szTmp2, lpMessage->lpszSubject);     //  Check for NULL
   strings
        }
        else _fstrcpy(szTmp2,"No subject text");
        if((lpMessage->lpszNoteText) != NULL){
          if(_fstrlen(lpMessage->lpszNoteText)>4096){   // Check for large
   message body
            MessageBox(0, "Message body to large", "MAPI2.C", MB_OK);
          }
         _fstrcpy(szTmp, lpMessage->lpszNoteText);
        }
        else _fstrcpy(szTmp, "No message body");
        printf("\nSUBJECT: %s\n", szTmp2);
        printf("\nNOTETEXT: \n%s\n", szTmp);
        /****** free memory used by MAPI *********************/ 
        err = MAPIFreeBuffer(lpMessage);
        if(err != SUCCESS_SUCCESS)
        {
          MessageBox(0, "Error freeing memory", "Error",MB_OK);
        }
      //get next message ID.
      lstrcpy(lpszSeedMessageID, lpszMessageID);
      err = MAPIFindNext(lhSession, 0L, "IPM.Microsoft Mail.Note",
   lpszSeedMessageID, 0L, 0L, lpszMessageID);
      if(err != SUCCESS_SUCCESS)
      {
        MessageBox(0, "No more messages", "Warning",
        MB_OK);
        err = MAPILogoff(lhSession, 0L, 0L, 0L);
        return(0);
      }
      lppMessage=(lpMapiMessage FAR *) &lpMessage;

    }while(err == SUCCESS_SUCCESS);

   /************** Logoff  ***************/ 
    err = MAPILogoff(lhSession, 0L, 0L, 0L);
    return(0);
    }

Additional query words: 3.00 3.20 3.50 visual basic read mail

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Keywords          :  
Technology        : kbMailSearch kbZNotKeyword3 kbMailPCN320 kbMailPCN300 kbMailPCN350
Version           : WINDOWS:3.0,3.2,3.5

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