(Unicode C) Find XML Element where Attribute = Value

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Finds an XML element at a particular location where an attribute has a specified value.

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#include <C_CkXmlW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkXmlW xml;
    const wchar_t *notUsed;

    // We have the following XML and wish to find the value of the time attribute where msg = "alert-from".

    // <cdr id="4e5d3e7f41bf6201ad81000c29703270" e164="6207">
    //     <user>
    //         <grp name="wfln" mode="active"/>
    //     </user>
    //     <event msg="setup-to" time="287069" e164="5034"/>
    //     <event msg="alert-from" time="287069" e164="5034"/>
    //     <event msg="rel-to" time="287079" e164="5034"/>
    // </cdr>

    // First, build the above XML:

    xml = CkXmlW_Create();
    CkXmlW_putTag(xml,L"cdr");
    CkXmlW_AddAttribute(xml,L"id",L"4e5d3e7f41bf6201ad81000c29703270");
    CkXmlW_AddAttribute(xml,L"e164",L"6207");
    CkXmlW_UpdateAttrAt(xml,L"user|grp",TRUE,L"name",L"wfln");
    CkXmlW_UpdateAttrAt(xml,L"user|grp",TRUE,L"mode",L"active");
    CkXmlW_UpdateAttrAt(xml,L"event",TRUE,L"msg",L"setup-to");
    CkXmlW_UpdateAttrAt(xml,L"event",TRUE,L"time",L"287069");
    CkXmlW_UpdateAttrAt(xml,L"event",TRUE,L"e164",L"5034");
    CkXmlW_UpdateAttrAt(xml,L"event[1]",TRUE,L"msg",L"alert-from");
    CkXmlW_UpdateAttrAt(xml,L"event[1]",TRUE,L"time",L"287069");
    CkXmlW_UpdateAttrAt(xml,L"event[1]",TRUE,L"e164",L"5034");
    CkXmlW_UpdateAttrAt(xml,L"event[2]",TRUE,L"msg",L"rel-to");
    CkXmlW_UpdateAttrAt(xml,L"event[2]",TRUE,L"time",L"287079");
    CkXmlW_UpdateAttrAt(xml,L"event[2]",TRUE,L"e164",L"5034");

    // Show that we have the above XML
    wprintf(L"%s\n",CkXmlW_getXml(xml));

    // Find the element where msg = "alert-from"
    // This updates the xml object's reference to the found element (if successful).
    notUsed = CkXmlW_chilkatPath(xml,L"/A/event,msg,alert-from|$");
    if (CkXmlW_getLastMethodSuccess(xml) == FALSE) {
        wprintf(L"Not found.\n");
        CkXmlW_Dispose(xml);
        return;
    }

    // Get the value of the "time" attribute.
    wprintf(L"time = %s\n",CkXmlW_getAttrValue(xml,L"time"));

    // Restore the xml object's internal reference to the root of the XML document
    CkXmlW_GetRoot2(xml);


    CkXmlW_Dispose(xml);

    }