(Unicode C++) Fetch 1st N Headers of Search Results

Calls Search to get a message set, then downloads the 1st N messages in the message set. There are two equivalent ways of doing it: (1) iterate from 0 to N-1 and download each message individually, or (2) create a new message set that contains the 1st N messages and pass it to FetchHeaders. Both are demonstrated here.

Note: This example requires Chilkat v11.0.0 or greater.

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#include <CkImapW.h>
#include <CkMessageSetW.h>
#include <CkEmailW.h>

void ChilkatSample(void)
    {
    bool success = false;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkImapW imap;

    // Connect to an IMAP server.
    // Use TLS
    imap.put_Ssl(true);
    imap.put_Port(993);
    success = imap.Connect(L"imap.example.com");
    if (success == false) {
        wprintf(L"%s\n",imap.lastErrorText());
        return;
    }

    // Login
    success = imap.Login(L"****",L"****");
    if (success == false) {
        wprintf(L"%s\n",imap.lastErrorText());
        return;
    }

    // Select an IMAP mailbox
    success = imap.SelectMailbox(L"Inbox");
    if (success == false) {
        wprintf(L"%s\n",imap.lastErrorText());
        return;
    }

    // Get the message IDs of all the emails in the mailbox
    // We can choose to fetch UIDs or sequence numbers.
    bool fetchUids = true;
    CkMessageSetW messageSet;
    success = imap.QueryMbx(L"ALL",fetchUids,messageSet);
    if (success == false) {
        wprintf(L"%s\n",imap.lastErrorText());
        return;
    }

    int numFound = messageSet.get_Count();
    if (numFound == 0) {
        wprintf(L"No messages found.\n");
        return;
    }

    // Get the 1st 10 messages in messageSet.
    int upperBound = 10;
    if (numFound < upperBound) {
        upperBound = numFound;
    }

    int i = 0;
    bool bUid = messageSet.get_HasUids();
    bool headerOnly = true;
    CkEmailW email;

    while (i < upperBound) {

        success = imap.FetchEmail(headerOnly,messageSet.GetId(i),bUid,email);
        if (success == false) {
            wprintf(L"%s\n",imap.lastErrorText());
            return;
        }

        wprintf(L"%d: %s\n",i,email.subject());

        i = i + 1;
    }

    // Disconnect from the IMAP server.
    success = imap.Disconnect();
    }