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<!DOCTYPE task

  PUBLIC "-//OASIS//DTD DITA Task//EN" "task.dtd">

<task id="GUID-FFBD95C6-0B12-5FD7-BA69-89BBFB97F0A1" xml:lang="en"><title>Call

Resume Tutorial </title><shortdesc>This tutorial describes how to resume a call with the telephony

API for applications. </shortdesc><prolog><metadata><keywords/></metadata></prolog><taskbody>

<steps id="GUID-43E11818-C05F-53B4-8DCB-7246BAE47AC8">

<step id="GUID-DF620D49-997B-5780-A7E7-EAD2CBEDBC40"><cmd/>

<info>create a new instance of <xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>CTelephony</apiname></xref>  </info>

</step>

<step id="GUID-C5296605-2F1B-5084-B34B-F764F358AF27"><cmd/>

<info>use <xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>CTelephony::GetCallDynamicCaps()</apiname></xref> to

check if the device supports resume function </info>

</step>

<step id="GUID-F93FC655-7405-5BD5-9CA3-A15D09D889B5"><cmd/>

<info>once a call is on hold, you can resume the call by with <xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>CTelephony::Resume()</apiname></xref>. </info>

<info>Pass the ID of the call to resume. </info>

</step>

<step id="GUID-04EC72AA-318C-5BFE-A8AD-374929229D50"><cmd/>

<info>pass the enumeration <xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>CTelephony::EResumeCancel</apiname></xref> to

cancel the asynchronous request </info>

</step>

</steps>

<example id="GUID-BFF56F2B-E7D7-5CA4-9130-AE4FC768431A"><title>Call resume

example</title> <codeblock id="GUID-71F14CC1-40DF-5A89-9A6F-D8D31F544FFF" xml:space="preserve">#include &lt;e32base.h&gt;

#include <Etel3rdParty.h>

class CClientApp : public CActive

    { 

private:

    CTelephony* iTelephony;

    CTelephony::TCallId iCallId;

public:

    CClientApp(CTelephony* aTelephony, CTelephony::TCallId aCallId);

    TInt SomeFunction();

private:

    /*

       These are the pure virtual methods from CActive that  

       MUST be implemented by all active objects

       */

    void RunL();

    void DoCancel();

   };

CClientApp::CClientApp(CTelephony* aTelephony, CTelephony::TCallId aCallId)

    : CActive(EPriorityStandard),

      iTelephony(aTelephony),

      iCallId(aCallId)

    {

    //default constructor

    }

TInt CClientApp::SomeFunction()

    {

    // Check that the phone supports Resuming calls.

    CTelephony::TCallCapsV1 callCapsV1;

    CTelephony::TCallCapsV1Pckg callCapsV1Pckg(callCapsV1);

    iTelephony->GetCallDynamicCaps(iCallId, callCapsV1Pckg);

    if( callCapsV1.iControlCaps & CTelephony::KCapsResume )

       {

       // The call represented by 'iCallId' can be resumed

       iTelephony->Resume(iStatus, iCallId);

       SetActive();

       return KErrNone;

       }

    else

       {

       // The call cannot be resumed; 

       // return an error indicate this.

       return KErrNotSupported;

       }

    }

void CClientApp::RunL()

    {

    if(iStatus==KErrNone)

       {} // The call has been resumed successfully;

    }

void CClientApp::DoCancel()

    {

    iTelephony->CancelAsync(CTelephony::EResumeCancel);

    }

</codeblock> </example>