弄一个label或则textbox,然后在Timertick事件写上统计的代码即可
timertick事件
e.Form.Controls("TextBox1").Text = e.Form.Controls("Table1").Table.compute("sum(数量)")
http://www.foxtable.com/help/topics/0393.htm
开启timertick
http://www.foxtable.com/help/topics/1301.htm