(Unicode C++) Transition from MailMan.FetchByMsgnum to MailMan.FetchOne

Provides instructions for replacing deprecated FetchByMsgnum method calls with FetchOne.

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

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#include <CkMailManW.h>
#include <CkEmailW.h>

void ChilkatSample(void)
    {
    CkMailManW mailman;

    // ...
    // ...

    int msgnum = 123;

    // ------------------------------------------------------------------------
    // The FetchByMsgnum method is deprecated:

    CkEmailW *emailObj = mailman.FetchByMsgnum(msgnum);
    if (mailman.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",mailman.lastErrorText());
        return;
    }

    // ...
    // ...

    delete emailObj;

    // ------------------------------------------------------------------------
    // Do the equivalent using FetchOne.
    // Your application creates a new, empty Email object which is passed 
    // in the last argument and filled upon success.

    bool headerOnly = false;
    // Irrelevant because we are not downloading headers-only.
    int numBodyLines = 0;

    CkEmailW emailOut;
    bool success = mailman.FetchOne(headerOnly,numBodyLines,msgnum,emailOut);
    if (success == false) {
        wprintf(L"%s\n",mailman.lastErrorText());
        return;
    }
    }