Yes, if you sign your own CAB file, you can do a completely hidden upload or download with Xfile. The CAB file provided with Xfile is signed by SoftArtisans. As an extra security feature, users will be prompted to confirm any upload or download which uses only the non-visual file transfer control (the XFRequest object). By creating and signing your own CAB file with the dlls specified in our instructions, you can eliminate this confirmation dialog. Please see the following documentation:

Instructions for signing your own SAXFile.cab: http://support.softartisans.com/docs/XFile/Webhelp/install_cabsigning.htm

About the XFRequest Object: http://support.softartisans.com/docs/XFile/Webhelp/programmer_ref_xfrequest.htm