Dynamic Controls and ViewState Management

[Aaronius]

I do admit I am fairly new to ASP.NET. With that, I've also poured over dozens of websites and forum posts, sifted through pages of text, and spent hours stuck on this problem. I'm now pleading for your help. Here's the deal. I have a form that by default has this:
URL to be unblocked: __________________

The underline being a text box. Below this field, I have a text link that says "Add another", which essentially creates this:

URL to be unblocked: __________________

__________________

Again, both underlines being text boxes. The user can continue to hit "add another" as many times as he/she would like, dynamically creating many textboxes. On the code-behind, I have a property called URLControlsCount that gets and sets a viewstate variable that tracks how many textboxes should show up (if the variable does not yet exist in the ViewState, it returns 1 so that at least one textbox will always show up, as you will see below). Now, on Page_Init, I call a function called CreateURLControls() which contains the following:

Dim i As Integer
For i = 1 to URLControlsCount
        Dim newTextBox As TextBox = New TextBox()
        newTextBox.ID = "url" + i.ToString()
        URLFieldsPlaceHolder.Controls.Add(newTextBox)
Next

The Add Another link runs the following code:

Dim newTextBox As TextBox = New TextBox()
URLControlsCount += 1
newTextBox.ID = "url" + URLControlsCount.ToString()
URLFieldsPlaceHolder.Controls.Add(newTextBox)

Now the problem I'm having is that, because I call CreateURLControls() from Page_Init, the ViewState has not been loaded, therefore URLControlsCount doesn't hold anything and so the wrong number of textboxes is created. If I move the CreateURLControls() call to Page_Load, it creates the right number of controls, but then if I want to get the value of the textboxes by using ctype(URLFieldsPlaceHolder.FindControl(url1), TextBox).Text, I get an empty string...I suppose because the ViewState has not been "bound" to the controls yet (not until the end of Page_Load). So I'm stuck in the predicament.

Can anyone shed some light? Do I need to store URLControlsCount in a session variable or something to get around the issue? Thanks!!