RApaLsSession apaLsSession;

const TUid KOSSBrowserUidValue = {0x1020724D};

HBufC* param = HBufC::NewLC(64);

param->Des().Copy(_L("4 http://www.yahoo.com/"));

TUid id(KOSSBrowserUidValue);

TApaTaskList taskList(CEikonEnv::Static()->WsSession());

TApaTask task = taskList.FindApp(id);

if(task.Exists())

    {

    task.BringToForeground();

    HBufC8* param8 = HBufC8::NewLC(param->Length());

    param8->Des().Append(*param);

    task.SendMessage(TUid::Uid(0), *param8); // UID not used

    CleanupStack::PopAndDestroy(param8);

    }   

else

    {

    if(!apaLsSession.Handle())

      {

      User::LeaveIfError(apaLsSession.Connect());

      }

    TThreadId thread;

    User::LeaveIfError(apaLsSession.StartDocument(*param, KOSSBrowserUidValue, thread));

    apaLsSession.Close();       

    }

CleanupStack::PopAndDestroy(param);

注意：如果浏览器正在加载一个URL，而另一个程序试图去打开它。那就会在加载新的url时报“Unable to retrieve”错误。