Occurs when the progress of a download is updated. The PROGRESS property is set to the current progress value. The MAX-PROGRESS property is set to maximum progress value.
For the WEB-BROWSER2 control only, EVENT-DATA-1 is set to 1 when the current number of downloaded bytes is greater than 2 gigabytes, and EVENT-DATA-2 is set to the current number of downloaded bytes (modulo 2 gigabytes). Also, after this message, you can query W2P-PROGRESS to get the full value.