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<concept xml:lang="en" id="GUID-D9EE6C26-B0F0-58B9-BC17-4E18136187F8"><title>Cancelling and closing transactions</title><prolog><metadata><keywords/></metadata></prolog><conbody><p>Transactions that have been submitted can be cancelled at any time using <xref href="GUID-2E673024-239B-3965-8880-C47B7CC24EF6.dita#GUID-2E673024-239B-3965-8880-C47B7CC24EF6/GUID-48A73A16-E6EB-39F4-88A5-0D84BD164FF2"><apiname>RHTTPTransaction::Cancel()</apiname></xref>. When this is done, no further events are received for that transaction as originally submitted. </p> <p>An example from <filepath>HTTPEXAMPLECLIENT</filepath>: </p> <codeblock id="GUID-E403CB8C-D262-5AC6-8BD3-FFE0A67EC274" xml:space="preserve">void CHttpEventHandler::MHFRunL(RHTTPTransaction aTransaction, const THTTPEvent&amp; aEvent)

    {

    switch (aEvent.iStatus)

        {

        case THTTPEvent::EGotResponseHeaders:

            {

            ...

            // If we're cancelling, do it now...

            if (cancelling)

                {

                iUtils.Test().Printf(_L("\nTransaction Cancelled\n"));

                aTransaction.Close();

                CActiveScheduler::Stop();

                }