.value

I'm trying to write an asp.net page that will keep variables using the .value command. It's not working. Here's my code

Dim custID As Integer
        Dim noMovies As Integer
        Dim price As Double
        Dim discount As Double
        Dim total As Double

            custID = Integer.Parse(Me.idTextBox.Text)
            noMovies = Integer.Parse(Me.numMovTextBox.Text)
            price = noMovies * RENTAL_RATE
            discount = price * DISCOUNT_RATE
            total = price - discount


        totSales += 1
        'totSalesHiddenField.value = totSales.ToString()    couldn't get this working for the life of me
        totIncome += total

            priceTextBox.Text = price.ToString("C")
            discountTextBox.Text = discount.ToString("C")
            totDueTextBox.Text = total.ToString("C")

            totSalesTextBox.Text = totSales
            totRevTextBox.Text = totIncome.ToString("C")

I keep getting errors that .value is not part of string, decimal, integer, etc