Force download of URL

Is there any way to programmatically force a download of a URL? I can view a URL by calling browser_window_go() but this will only start a download if it is of an unknown MIME type. Tracing through the code, it loks like the only entry point to downloading involves holding the shift key and physically clicking on the link - which then calls an internal function (maybe making this accessible to platform code is all that is needed?) I'd like to add a "save link" option to my context menu, and I've just had a request in for a SAVEURL ARexx command - which would need something like browser_window_download(url,filename_to_be_passed_back_ to_the_download_functions) Chris