Variable not setting or for loop not working correctly - vb.net

Question

i'm having an issue with setting a variable to the return value of a function i made i can't seem to be able to get it to work and i get no errors or feedback from visual studios even in strict mode
Imports System.Net
Imports System.IO
Imports System.ComponentModel
Public Class Form2
Dim i As Integer
Public CleanSearchTexts As String()
Dim count As Integer = 0
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
If BackgroundWorker1.IsBusy = False Then
i = RichTextBox1.Lines.Count
i = i - 1
BackgroundWorker1.RunWorkerAsync()
Else
MsgBox("Threads are busy")
End If
End Sub
Private Sub StartThreads()
Dim SearchText As String
For count = count To i
SearchText = LineFunc(count)
count += 1
SearchText = CType(Ask_Query(SearchText), String)
SearchText = CType(Bing_Query(SearchText), String)
SearchText = CType(Yahoo_Query(SearchText), String)
Dim thread_count As String = CType(Process.GetCurrentProcess().Threads.Count - 20, String)
Label_T(thread_count)
Threading.Thread.Sleep(500)
If SearchText.Contains("All_Query:Yes") Then
SearchText = SearchText.Replace("All_Query:Yes", "")
RTB(SearchText)
End If
Next
End Sub
Private Delegate Sub UpdateStatus(ByVal s As String)
Private Delegate Sub UpdateLabel(ByVal thread_count As String)
Public Delegate Function GetTextBox(ByVal index As Integer) As String
Public Function LineFunc(ByVal index As Integer) As String
If InvokeRequired Then
Invoke(New GetTextBox(AddressOf LineFunc), index)
Else
Dim indexSearchText As String
indexSearchText = RichTextBox1.Lines(index)
Return indexSearchText
End If
End Function
Public Sub RTB(ByVal s As String)
If Me.InvokeRequired Then
Me.Invoke(New UpdateStatus(AddressOf RTB), New Object() {s})
Else
RichTextBox2.AppendText(Environment.NewLine & s)
End If
End Sub
Public Sub Label_T(ByVal thread_count As String)
If Me.InvokeRequired Then
Me.Invoke(New UpdateLabel(AddressOf Label_T), New Object() {thread_count})
Else
Label3.Text = "Threads Running: " + thread_count
End If
End Sub
Private Sub BackgroundWorker1_DoWork(sender As Object, e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
BackgroundWorker1.WorkerSupportsCancellation = True
BackgroundWorker1.WorkerReportsProgress = True
Dim count As Integer
Dim num As Integer = CInt(TextBox1.Text) - 1
For count = 0 To num
Dim thread = New Threading.Thread(AddressOf StartThreads)
thread.IsBackground = True
thread.Name = "Web Thread #" + CType(count, String)
thread.Start()
Threading.Thread.Sleep(500)
Next
End Sub
Private Sub BackgroundWorker1_RunWorkerCompleted(sender As Object, e As RunWorkerCompletedEventArgs) Handles BackgroundWorker1.RunWorkerCompleted
MsgBox("Work is done")
End Sub
End Class
the issue is clearly with either the line getting function or the for count
i have tested the function by adding a button and doing the process of setting a variable to the return and msgboxing it and it works perfectly not only that when i breakpoint it it shows it's returning the right output but its just not setting it for whatever reason in this sub
Public Sub StartThreads(ByVal List As Object)
Dim List2 As String() = CType(List, String())
For Each dork As String In List2
dork = CType(Ask_Query(dork), String)
dork = CType(Bing_Query(dork), String)
dork = CType(Yahoo_Query(dork), String)
Dim thread_count As String = CType(Process.GetCurrentProcess().Threads.Count - 20, String)
Label_T(thread_count)
Threading.Thread.Sleep(500)
If dork.Contains("All_Query:Yes") Then
dork = dork.Replace("All_Query:Yes", "")
RTB(dork)
End If
Next
End Sub
and here is the function
Public Delegate Function GetTextBox(ByVal index As Integer) As String
Public Function LineFunc(ByVal index As Integer) As String
If InvokeRequired Then
Invoke(New GetTextBox(AddressOf LineFunc), index)
Else
Dim indexSearchText As String
indexSearchText = RichTextBox1.Lines(index)
Return indexSearchText
End If
End Function
Update: List Split Func
Public Function splitData(ByVal width As Integer, ByVal dd As List(Of String)) As List(Of List(Of String))
Dim dds As New List(Of List(Of String))
Dim numberOfLists As Integer = (dd.Count \ width)
For i As Integer = 0 To numberOfLists
Dim newdd As List(Of String)
newdd = dd.Skip(i * width).Take(width).ToList()
dds.Add(newdd)
Next i
Return dds
End Function
Updated Background Worker
Private Sub BackgroundWorker1_DoWork(sender As Object, e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
BackgroundWorker1.WorkerSupportsCancellation = True
BackgroundWorker1.WorkerReportsProgress = True
Dim dds As New List(Of String)
GetList(dds)
Dim num As Integer = CInt(TextBox1.Text)
Dim ThreadCount As Integer = CInt(TextBox1.Text)
If ThreadCount > 1 Then
ThreadCount -= 1
End If
Dim RTBLines As Integer = RTB_Lines()
num = CInt(RTBLines / num)
num = CInt(Math.Ceiling(num))
Dim splitdd As List(Of List(Of String)) = CType(splitData(num, dds), List(Of List(Of String)))
For count = 0 To ThreadCount
Dim ListArray As String() = splitdd(count).ToArray
Dim newthread As New Thread(AddressOf StartThreads)
newthread.Name = "Web Thread #" + CType(count, String)
newthread.Start(ListArray)
Threading.Thread.Sleep(500)
Next
End Sub