How to use GetParent and GetParent2

How to use GetParent and GetParent2. This is a snippet of the document used in this example:

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#include <CkXml.h>
#include <CkString.h>

void ChilkatSample(void)
    {

    CkXml xml0;
    CkXml *xml = 0;

    //  The Chilkat XML component is freeware.

    //  Load an XML document.  Typically you might call LoadXml
    //  to load an XML file.  This example loads an XML file from
    //  a URL:
    xml = xml0.HttpGet("http://www.chilkatsoft.com/testData/bookstore.xml");

    //  The xml object points to the root node of the XML document.

    //  Set bookNode equal to the 1st child of the root.
    CkXml *bookNode = 0;
    bookNode = xml->GetChild(0);

    //  Set titleNode equal to the title child of bookNode:
    CkXml *titleNode = 0;
    titleNode = bookNode->GetChildWithTag("title");

    //  Call GetParent to return a new object pointing to the parent node:
    CkXml *bookNode2 = 0;
    bookNode2 = titleNode->GetParent();

    //  bookNode2 and bookNode point to the same node.

    //  Call GetParent2 (which returns nothing) to modify the internal
    //  pointer within the calling object so that it points to the immediate parent:
    titleNode->GetParent2();

    //  Now titleNode points to the same node as bookNode2 and bookNode.
    //  To prove it, generate the XML sub-tree rooted at the calling
    //  node and display each:
    CkString str1;
    CkString str2;
    CkString str3;
    str1 = bookNode->getXml();
    str2 = bookNode2->getXml();
    str3 = titleNode->getXml();

    printf("%s\n",(const char *)str1);
    printf("%s\n",(const char *)str2);
    printf("%s\n",(const char *)str3);

    }