title: Custom variable in dynamic button creation in PayPal
body: <p>Currently in PayPal you can dynamically generate PayPal Buttons using the following</p>
  
  <p><a href="https://developer.paypal.com/webapps/developer/docs/classic/api/button-manager/BMCreateButton_API_Operation_NVP/" rel="nofollow">BMCreateButton</a></p>
  
  <p>Is their a way to add a variable called <code>custom</code> to the button as It's not documented within the API?</p>