[RESOLVED] replacing static url variables 'within a sub' with Textbox input

[jalexander]

Alright in my last post, dunfiddlin helped me figure out how to pause this Sub (which is ran in/by a background worker)
In this post I'm trying to figure out how to replace URL variables..with 'textboxs' i can edit via my form.
Alright so here is my code...and I want to replace some of the url variables with TextBox's incase I want to collect names just in a certain contest thread. I did figure out how to place a Textbox for the # of seconds pausing though LoL :goose:

    Private Sub ParseUsers()
        Dim pageSrc As String = GetStuff("http://www.my-forum.com/my-search/index.htm?get_forum_id_sub=11&thread_id=22&b=1")
        Dim maxPages As Integer = GetMaxPages(pageSrc)
        ProgressBar1.Maximum = maxPages
        Profilelist.AddRange(ExtractUsers(pageSrc))
        For i As Integer = 2 To maxPages
            pageSrc = GetStuff("http://www.my-forum.com/my-search/index.htm?get_forum_id_sub=11&thread_id=22&b=" & i.ToString)
            Profilelist.AddRange(ExtractUsers(pageSrc))
            ProgressBar1.Value = i
            Dim t As UInt64 = Now.Ticks
            Do Until Now.Ticks - t >= TextBox3.Text * 10 ^ 7 'where TextBox3.Text is required delay in seconds
            Loop
        Next
        IO.File.WriteAllLines("USERS.txt", Profilelist.ToArray)
    End Sub

I don't know how to do this spacing/context wise...but here's what I'm wanting to replace

?get_forum_id_sub=11&  (replace just the #11 with TextBox1.Text)
&thread_id=22&  (replace just the #22 with TextBox2.Text)