title: apex button to call a page in another application
body: <p>I have a workspace with which I have 5 applications based on same schema. Now I want to have a main page from where I could call main pages of all these applications. I used this syntax to call home page in another application but to no avail</p>
  
  <pre><code>f?p=4000:4150:&amp;APP_SESSION.
  </code></pre>
  
  <p>Where <code>4000:4150</code> are the values for the application and the page I want to display. </p>
  
  <p>Please let me know where am I making mistake. </p>