Hi,if you edit the "Iframe Options", you should be able to specify a URL, the size of the window, and also add querystring parameters. Based on the URL above, I see that you can perhaps specify the URL as:
http://api.locatemystore.com/result...ontSize=10 You can then add querystring parameters (option: pass through querystring) for the remainder of the fields (ie. storetype,postcode) or whatever else that you are passing in your Dynamic Forms page.
See if this does the trick or not. -- David