Hi Anand,

Most aspects of format are defined by CultureInfo object. That includes negative patterns as well. Besides country, patterns can be different for different "types" of number: number/currency/percent. You may configure those properties globally for whole page using culture of CurrentThread, or you can do that separately for every editor. I think there is NumericFormat property, which can be set within Page.OnLoad or similar event. You may look at sample applications for WebDataInput related to custom-formats and dot-net docs for CultureFormatInfo.