VB.net Print to textbox from another thread - vb.net

Question

I have the following code and I am wanting to basically replicate the content of an ever changing text file and dump it into a text box display, I have the following code but it's not working at the moment.
If Not File.Exists(masterPath) Then
File.Create(masterPath).Dispose()
End If
Try
reader = New StreamReader(chatlog)
Catch
File.Create(chatlog)
bool = False
End Try
If bool Then
'Dim writer As New StreamWriter(masterPath)
Dim text As String
Do Until reader.EndOfStream
text = reader.ReadLine()
logMenu.AppendText(text & Environment.NewLine)
Loop
reader.Close()
File.Delete(chatlog)
File.Create(chatlog).Dispose()
End If
Thread.Sleep(1000)
Loop

Answer 1

Create a new method that uses Invoke as needed, like this:
Private Sub DisplayLogLine(ByVal text As String)
If logMenu.InvokeRequired Then
logMenu.Invoke(AddressOf DisplayLogLine, {text})
Return
End If
logMenu.AppendText(text & Environment.NewLine)
End Sub
Then call it with DisplayLogLine(reader.ReadLine()) in the loop.
Answer based on quick referencing Modifying the properties of controls from another thread in VB.net; it's been a while since I wrote multithreaded UI code in .NET.