C / C++ / MFC

28-Oct-03 4:08

Using Outlook's type library:

COleVariant     vtOptional((long) DISP_E_PARAMNOTFOUND, VT_ERROR),
                vtTrue((short) TRUE);
_Application    app;
_NameSpace      ns;
MAPIFolder      folderInbox;
 
if (app.CreateDispatch("Outlook.Application") == TRUE)
{
    ns = app.GetNamespace("MAPI");
 
    ns.Logon(vtOptional, vtOptional, vtOptional, vtTrue);
        
    folderInbox = ns.GetDefaultFolder(6); // Inbox
}

Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?

urgent!

ranjjj26-Oct-03 22:57

26-Oct-03 22:57

the following is a c++ program written to access the mailbox of the defaulkt mail client and read the mails ...
i experimented te code only with outlook...as that is only configured in my machine..the code works only iff outlook window is opened ..also it displays only 1 read mail for 1 execution of thios code...i want to dispaly all unread mails at a time when i run this program once..what are hte necessary changes to be made in the program..can someone plzz kindly help me in this!

#include<stdio.h>
#include<stdlib.h>
#include<iostream.h>
#include<conio.h>
#include<windows.h>
#include<mapi.h>
#include<mapidefs.h>
#include<winbase.h>

//assumption::character interface being used.
//the Simple MAPI functions for reading messages can't
//log on implicitly and require an explicit session handle.

/*the client application defines needed variables and
logs on to get a session handle */
/*ULONG ReadNextUnreadMsg(void);*/

ULONG ReadNextUnreadMsg()
{

ULONG err;
CHAR rgchMsgID[513]; // Message IDs should be >= 512 CHARs + a null.
MapiMessage *lpMessage; // Used to get a message back from MAPIReadmail
ULONG i; // Ubiquitous loop counter.
int totalLength;
int length;
int LINE_WIDTH = 0;

// Number of characters printed on a line.

LHANDLE m_lhSession; // Need a session for MAPIFindNext.

HINSTANCE hlibMAPI = LoadLibrary ( "MAPI32.DLL" );

LPMAPILOGON m_MAPILogon = (LPMAPILOGON)GetProcAddress(hlibMAPI,
"MAPILogon");
LPMAPIFINDNEXT m_MAPIFindNext = (LPMAPIFINDNEXT) GetProcAddress (hlibMAPI, "MAPIFindNext");
LPMAPIREADMAIL m_MAPIReadMail = (LPMAPIREADMAIL) GetProcAddress (hlibMAPI, "MAPIReadMail");
LPMAPIFREEBUFFER m_MAPIFreeBuffer = (LPMAPIFREEBUFFER) GetProcAddress (hlibMAPI, "MAPIFreeBuffer");
LPMAPILOGOFF m_MAPILogoff = (LPMAPILOGOFF) GetProcAddress (hlibMAPI, "MAPILogoff");

err =m_MAPILogon(0L, // ulUIParam; 0 always valid.
"Microsoft Outlook Internet Settings",// profile name to use when logging on
NULL, // No password needed.
0L, // Use shared session.
0L, // Reserved; must be 0.
&m_lhSession); // Session handle.
if (err != SUCCESS_SUCCESS) // Make sure MAPILogon succeeded.
{
printf("Error: could not log on\r\n");
return(err);
}

//next..the client searches for the first unread message in the
//default folder in the store - probably the user's Inbox.
//Since there might not be any unread messages in the folder,
//the client first tests the return value from the MAPIFindNext
//function against MAPI_E_NO_MESSAGES before checking against
//SUCCESS_SUCCESS. If the call is successful, the client will have
///a valid message identifier to use to retrieve the first
// unread message

// find the first unread message

err = m_MAPIFindNext(m_lhSession, // explicit session required
0L, // always valid ulUIParam
NULL, // NULL specifies interpersonal messages
NULL, // seed message ID; NULL=get first message
MAPI_LONG_MSGID | // needed for 512 byte rgchMsgID.
MAPI_UNREAD_ONLY, // only get unread messages.
0L, // reserved; must be 0
rgchMsgID);// buffer to get back a message ID.

if (err == MAPI_E_NO_MESSAGES) // make sure a message was found
{
printf("No unread messages.\r\n");
return(err);
}
if (err != SUCCESS_SUCCESS) // make sure MAPIFindNext didn't fail
{
printf("Error while searching for messages\r\n");
return(err);
}

//The client can now be sure it is safe to retrieve the message.
//However, it is a good idea to check the return value from
//the MAPIReadMail function. If the call fails, the memory pointed
//to by the client's lpMessage pointer will not be accessible by
//the client. The client should not try to display a message at
//that location. Note that this example sets the
//MAPI_SUPPRESS_ATTACH flag so the returned message will not
//have any attachments in it and Simple MAPI will not create any
//temporary files for them.

// retrieve the message

err = m_MAPIReadMail(m_lhSession, // Explicit session required.
0L, // Always valid ulUIParam.
rgchMsgID, // The message found by MAPIFindNext.
MAPI_SUPPRESS_ATTACH, // TO DO: handle attachments.
0L, // Reserved; must be 0.
&lpMessage); // Location of the returned message.

if(err != SUCCESS_SUCCESS) // Make sure MAPIReadMail succeeded.
{
printf("Error retrieving message %s\r\n",rgchMsgID);
return(err);
}

/*Now, the client can display the message. As expected,
it begins by displaying the addressing information attached
to the message before displaying the subject line and message text.
When displaying the addressing information, it is best if you
can display friendly names. However, since friendly names are
not always available, you must verify that each recipient
structure's lpszName member points to a valid string,
and that the string is not a null string.
Display the sender's name or address; use the friendly name
if it is present.*/

if((lpMessage->lpOriginator->lpszName != NULL) &&
lpMessage->lpOriginator->lpszName[0] != '\0')
printf("From: %s\r\n",lpMessage->lpOriginator->lpszName);
else
printf("From: %s\r\n",lpMessage->lpOriginator->lpszAddress);

/*Displaying the recipients' addresses is complicated by the
need to avoid breaking a recipient's name or address across
two lines. This code can be further improved by differentiating
between recipients based on their ulRecipClass members so that
they can be properly displayed as To, CC, or BCC recipients.
As this code shows, handling recipient data can be the most
complex part of reading a message.// Display the recipients'
names or addresses. To Do: enhance
this code to separate the recipients into lists of MAPI_TO,
MAPI_CC, and MAPI_BCC recipients for separate display.*/

if(lpMessage->nRecipCount == 0)
printf("Warning: no recipients present for this message\r\n");
else
for(i = 0; i<lpmessage->nRecipCount; i++) // For each recipient...
{
/* This code uses lstrlen to calculate the length of strings and
// to validate that the strings have some content, since the
// length is needed anyway. This avoids the more verbose checks
// as were done for lpMessage->lpOriginator->lpszName earlier.

// lpszT references a name or address; simplifies later code.
// length is the length of the name or address*/

LPSTR lpszT;
lpszT = lpMessage->lpRecips->lpszName;

length = lstrlen(lpszT);

if(i == 0) // First recipient; need to do some initialization.
{

printf("Recipients:");
totalLength = 11; // since strlen("Recipients:") = 11.
}

// Decide whether to use the friendly name or the address.
if(length == 0)
length = lstrlen(lpszT=lpMessage->lpRecips->lpszAddress);

// Verify that the line has room for this name or address. If
// not, print a CR LF pair to go to the next line.

if(totalLength + length + 1 > LINE_WIDTH)
{

printf("\r\n");
totalLength = 0;
}

printf(" %s",lpszT); // Finally, print the name or address.
totalLength += length + 1;// Maintain the line length.

// If there are more addresses, separate them with semicolons.

if(i < (lpMessage->nRecipCount - 1))
{
printf(";");
totalLength++;
}
}

//Now, the client displays the subject line and message text if
//they are present. Note that the message text can be printed
//with a simple call to the C library function printf. Since
//the message was read with the MAPI_SUPPRESS_ATTACH flag set,
//there will be no attachments in it.// Display the subject
//and message body. Not printing anything
//for the subject is fine, but something should always be
//printed for the message body since it is the last thing
//that this function displays.

if(lpMessage->lpszSubject != NULL && // Standard validity check
lpMessage->lpszSubject[0] != '\0')
printf("Subject: %s\r\n",lpMessage->lpszSubject);
if(lpMessage->lpszNoteText != NULL && // Standard validity check
lpMessage->lpszNoteText[0] != '\0')
printf("Message Text:\r\n%s",lpMessage->lpszNoteText);
else
printf("No message text.\r\n");

//Finally, the client releases the memory that the MAPIReadMail
//function allocated for the message, closes the session,
//and returns a successful return value.

m_MAPIFreeBuffer(lpMessage);

m_MAPILogoff(m_lhSession, // The session.
0L, // 0 always valid for ulUIParam.
0L, // No logoff flags.
0L); // Reserved; must be 0.
return SUCCESS_SUCCESS; // Inform the caller of our success.

} // End of ReadNextUnreadMsg

void main()
{
HINSTANCE hlibMAPI = LoadLibrary ( "MAPI32.DLL" );
ReadNextUnreadMsg();

}

ranjani

David Crow27-Oct-03 2:46

27-Oct-03 2:46

ranjjj wrote:
the code works only iff outlook window is opened

Take a look at MAPILogon(). Its parameters govern whether to use an existing session, or create a new one.

Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?

ranjjj27-Oct-03 17:04

27-Oct-03 17:04

how to create a new one..
i tried doing it..
but didn't work out..
after reading the message,
the message is deleted from the inbox!

ranjani

David Crow28-Oct-03 2:45

28-Oct-03 2:45

ranjjj wrote:
how to create a new one..

MAPILogon(0, NULL, NULL, MAPI_LOGON_UI, 0, &m_lhSession);

Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?

ranjjj28-Oct-03 2:56

28-Oct-03 2:56

i don't want a dialog box to be displayed..
logon_ui does that right??
and...
the only problem now is..
it doesn't work out if the outlook window is not opened..
how to solve it..i tried using new sesion also..anddd..logon ui also..
it doesn't work!

ranjani

David Crow28-Oct-03 3:09

28-Oct-03 3:09

Then use:

MAPILogon(0, "Microsoft Outlook Internet Settings", NULL, MAPI_NEW_SESSION, 0, &m_lhSession);

Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?

ranjjj28-Oct-03 0:48

28-Oct-03 0:48

even when use the new session..
am able to read the mails only one at a time!
and also....
in the MAPIFindNext function ....
the fourth parameter being the pointer to the message identifier seed..
i'm [passing as Nul in the beginning to read the first unread mail..
how should i use it later??

ranjani

David Crow28-Oct-03 3:02

28-Oct-03 3:02

char sMessageId[512],
     sMessageSeed[512];
int  nReturn;
 
sMessageId[0]   = '\0';
sMessageSeed[0] = '\0';
 
nReturn = MAPIFindNext(m_lhSession, 0, NULL, sMessageSeed, MAPI_LONG_MSGID | MAPI_UNREAD_ONLY, 0, sMessageId);
if (SUCCESS_SUCCESS == nReturn)
{
    do
    {
        // read the message
        
        lstrcpy(sMessageSeed, sMessageId);        
        nReturn = MAPIFindNext(m_lhSession, 0, NULL, sMessageSeed, MAPI_LONG_MSGID | MAPI_UNREAD_ONLY, 0, sMessageId);
    } while (SUCCESS_SUCCESS == nReturn);
}

Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?

ranjjj28-Oct-03 3:22

28-Oct-03 3:22

even when i use this..
am not able to log o..when outlook window is not opened!

ranjani

David Crow28-Oct-03 4:10

28-Oct-03 4:10

What is the return value of MAPILogon()?

Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?

ranjjj28-Oct-03 17:02

28-Oct-03 17:02

the return value
is
MAPI_LOGON_FAILURE ..integer value is 3!

ranjani

David Crow28-Oct-03 3:05

28-Oct-03 3:05

ranjjj wrote:
also it displays only 1 read mail for 1 execution of thios code...

Because there is no loop. How would you expect it to read more than once?

Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?

ranjjj28-Oct-03 3:27

28-Oct-03 3:27

am convinced with that...
but...
am not able to log on when outlook window is not opened....
where can the fault be??
kindly help me ..plzz

ranjani

Anonymous28-Oct-03 22:49

Anonymous

28-Oct-03 22:49

Make outlook the default mail client (either from Internet Explorer -> Programs -> Email -> Microsoft Outlook, or from the registry HKLM\Software\Clients\Mail\(Default) = "Microsoft Outlook") and then try again

ranjjj28-Oct-03 22:53