title: BotFramework CardAction.postBack support for Skype
body: <p>I am attempting to present a HeroCard to a Skype user that contains one or more buttons that should perform a postBack to my API. My understanding is that the postBack (unlike imBack) is not supposed to display the message being posted back to my API from the Skype client.</p>
  
  <p>Here is the gist of what I am doing...</p>
  
  <pre><code>// loop through a list of quickReplies. Add each button to an array.
  {
      buttons.push(botBuilder.CardAction.postBack(session, quickReply.payload, quickReply.title));
  }
  
  // Create the HeroCard response.
  var card = new botBuilder.Message(session)
      .textFormat(botBuilder.TextFormat.xml)
      .attachments([
          new botBuilder.HeroCard(session)
              .buttons(buttons)
      ]);
  
  session.send(card);
  </code></pre>
  
  <p>The buttons of the HeroCard render just fine on the Skype client, but when I click one, the quickReply.payload is displayed similar to how the imBack works. I would have expected no reply to be displayed, but my API would receive the message containing the quickReply.payload.</p>
  
  <p>The BotFramework emulator seems to handle the postBack functionality just fine.</p>
  
  <p>Searching 'postBack' through the SDK did not turn up anything obvious. </p>
  
  <p>Does anyone know if CardAction.postBack is not supported for BotFramework/Skype? Or am I simply doing something wrong?</p>
  
  <p>Thanks!</p>