Hi Rhys,
I think you need to break this problem down slightly;
a) you need to get some data from a remote site. You say JavaScript is required to do this? That's probably not quite true, although it may be that you need to construct your HTTP request (using the NetWebClient class) quite carefully. JavaScript typically runs "in the browser" so although you can't run JavaScript in your program itself, you can almost certainly write Clarion code to construct the same request. I guess I would need more specifics though to be more specific.
b) you need to display information to the user. Does this need t be in HTML format? Or can it just be in normal clarion format (strings, text boxes, lists etc?)
c) A complete alternative is just to show the user the remote site, in your windows app, using File Explorer - which completely side-steps the two items above.
cheers
Bruce