Query string field to use to determine the ID for the upload process.
UploadIDQueryField parameter has default value "UploadID". A string "?UploadID=xxxxx" should be added to a file name of the "Action" parameter of the Form (for example, Action="processupload.aspx?UploadID=123456789").
Settings.SettingsParams Class | ElementIT.PowUpload Namespace