XFile's EnableUploadButton param allows you to enable or disable the built-in Upload button.
When EnableUploadButton is set to 1 (True), the visual upload control's "Start Upload" button will be visible. When EnableUploadButton is set to 0 (False), the button will not be displayed. EnableUploadButton is set to True by default.
For example, to enable the Upload button, you would put the following between the <OBJECT> and </OBJECT> tags for XFile:
<PARAM NAME="EnableUploadButton" VALUE="1">
When you click the built-in Upload button, XFile calls its Start() method, which begins the file transfer.
When using the built-in Upload button, however, you cannot use XFile's progress indication since there is no way to attach to the button_click event. You would need to attach to this event so you can set up and pop-up the progress indicator page before the file transfer starts. This is a feature that may be added in the future.