Remote iframe issues in Metro application
===

I've seen this SO posting about using iframe's and doing postMessage: [enter link description here][1]. I'm trying to do something very similar in Win8 Release Preview with an HTML/JS Metro application, but it seems rather impossible to replicate the behavior in that solution.

I have a simple frame stored in a remote location as:

    <!DOCTYPE html>
    <html>
    <body>
    <script>
    window.onmessage = function(e) {
        alert("Hello world");
    
        debugger;
    };
    </script>
    </body>
    </html>

In my default.html I have a div that contains the iframe as follows:

    <div id="container">
        <iframe id="frame" src="https://dl.dropbox.com/u/75275447/win8Frame.html"></iframe>
    </div>

I have an arbitrary button that executes a postMessage on #frame and would in a normal Html site trigger the remote frames onmessage, but instead I can look at the error list in VS and see:

> APPHOST9613: The app couldn’t navigate to
> https://dl.dropbox.com/u/75275447/win8Frame.html because of this
> error: RESOURCE_NOT_FOUND.

I have tried looking into any manifest that might allow me to achieve this and enabled:

 - Home or Work Networking
 - Internet (Client & Server)
 - Internet (Client)

To no avail... I have also tried having a frame (local to the application) loaded into the web contenxt (via ms-wwa-web://) that contains a div that hosts the remote iframe and chain up onmessage to forward a postMessage to the remote iframe, but again I see another error:

> APPHOST9624: The app can’t use script to load the
> ms-wwa-web://frame.html/ url because the url launches another app.
> Only direct user interaction can launch another app.

I'm beginning to think this is an impossible task.

  [1]: http://stackoverflow.com/questions/8901272/metro-app-and-iframe-cookie