Change Regional Setting in VB.NET

Dim TmpDateFormat As System.Globalization.CultureInfo
TmpDateFormat = New System.Globalization.CultureInfo("en-US")
TmpDateFormat.DateTimeFormat.ShortDatePattern = "M/d/yyyy"
TmpDateFormat.DateTimeFormat.ShortTimePattern = "h:mm tt"
TmpDateFormat.DateTimeFormat.FullDateTimePattern = "dddd, MMMM dd, yyyy h:mm:ss tt"
TmpDateFormat.NumberFormat.CurrencySymbol = "$"
TmpDateFormat.NumberFormat.CurrencyDecimalSeparator() = "."
TmpDateFormat.NumberFormat.CurrencyGroupSeparator() = ","