(Unicode C) Transition from MailMan.MxLookup to Dns.Query

Provides instructions for replacing deprecated MxLookup method calls with the Chilkat Dns class.

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

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#include <C_CkMailManW.h>
#include <C_CkDnsW.h>
#include <C_CkJsonObjectW.h>

void ChilkatSample(void)
    {
    HCkMailManW mailman;
    const wchar_t *emailAddr;
    const wchar_t *domain;
    HCkDnsW dns;
    HCkJsonObjectW json;
    BOOL success;
    int i;
    int count_i;

    mailman = CkMailManW_Create();

    // ...
    // ...

    emailAddr = L"joe@example.com";

    // ------------------------------------------------------------------------
    // The MxLookup method is deprecated:

    domain = CkMailManW_mxLookup(mailman,emailAddr);
    if (CkMailManW_getLastMethodSuccess(mailman) == FALSE) {
        wprintf(L"%s\n",CkMailManW_lastErrorText(mailman));
        CkMailManW_Dispose(mailman);
        return;
    }

    // ------------------------------------------------------------------------
    // Do the equivalent using the Chilkat DNS class

    dns = CkDnsW_Create();

    json = CkJsonObjectW_Create();

    // This gets all MX domains for an email address.  (Typically one domain.)
    // The preferred domain will be at index 0 (see below).
    success = CkDnsW_Query(dns,L"MX",emailAddr,json);
    if (success == FALSE) {
        wprintf(L"%s\n",CkDnsW_lastErrorText(dns));
        CkMailManW_Dispose(mailman);
        CkDnsW_Dispose(dns);
        CkJsonObjectW_Dispose(json);
        return;
    }

    i = 0;
    count_i = CkJsonObjectW_SizeOfArray(json,L"answer.mx");
    while (i < count_i) {
        CkJsonObjectW_putI(json,i);
        domain = CkJsonObjectW_stringOf(json,L"answer.mx[i].domain");
        wprintf(L"%s\n",domain);
        i = i + 1;
    }



    CkMailManW_Dispose(mailman);
    CkDnsW_Dispose(dns);
    CkJsonObjectW_Dispose(json);

    }