I have looked and looked but something is just not clicking. I'm running a simple tcp server in the background and want to update a datagrid with the incoming information. The server is working, but I cannot get the UI grid updated.

Code:
    Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
        Me.Show()
        BackgroundWorker1.RunWorkerAsync()
    End Sub

    Private Sub BackgroundWorker1_DoWork(sender As System.Object, e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
        BackgroundWorker1.WorkerReportsProgress = True
        Main()
    End Sub


    Private Sub BackgroundWorker1_ProgressChanged(sender As Object, e As System.ComponentModel.ProgressChangedEventArgs) Handles BackgroundWorker1.ProgressChanged

        Dim D(20) As String
        Dim ReceivedLine As String

        ReceivedLine = CType(e.UserState, String)
        MsgBox(ReceivedLine)  ' This comes up and gives me the correct text

        D = ReceivedLine.Split("~")

        Try

            Me.MainGrid.Rows.Add(D(0), D(1), D(2), D(3))   ' nothing is added to the grid.  I did an add in form_load and it works.

        Catch ex As Exception
            MsgBox(ex.Message)
        End Try

    End Sub
I set up the background worker and in the server sub I have reportprogress. The msgbox you see pops up and has the correct text in it, but the grid is not updating. I thought that could be assessed in this progress changed function. What am I missing?

Thanks