This code allows you to format a textbox string to the correct currency in SQL Server, independent of regional settings or the user input decimal symbol:

 Public Function FormatMoney(ByVal strValue As String) As String        '**This function fails if the user uses a digit grouping symbol and no decimal symbol.        '** Get the decimal symbol from the system        Dim DecS As String = Mid$(CStr(1.1), 2, 1)        '** Find the location of the first dot        Dim intDot As Integer = InStr(strValue, ".")        '** Find the location of the first comma        Dim intComma As Integer = InStr(strValue, ",")        '** Select your regional decimal sign        Select Case DecS            Case ","                '** Check to see if a dot or comma was used by the user                If intDot > intComma Then                    '** make sure only the decimal sign remains                    strValue = Replace(strValue, ",", "")                    strValue = Replace(strValue, ".", ",")                End If                '** round the value to 2 decimals                strValue = Decimal.Round(strValue, 2)                '** prepare the value for SQL server                strValue = Replace(strValue, ",", ".")            Case "."                If intComma > intDot Then                    '** make sure only the decimal sign remains                    strValue = Replace(strValue, ".", "")                    strValue = Replace(strValue, ",", ".")                End If                '** round the value to 2 decimals                strValue = Decimal.Round(strValue, 2)        End Select        Return strValue    End Function