Hangs when Paste Button is pressed!

I am working on a solution which uses PDFSharp to print greetings on A4 paper.
When the paste button is clicked the Messagebox shows the verse with the added VBCrLf in it, so the paste code is OK, but the it runs the 'txbVerse_TextChanged' which I think it is where it hangs.

Here is the code for the form:

Code:

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Imports System.Data.SqlClient
Imports System.Drawing
Imports PdfSharp
Imports PdfSharp.Drawing
Imports PdfSharp.Pdf
Imports PdfSharp.Drawing.Layout
Enum pageOrientation
    Landscape
    Portrait
End Enum
Enum pagesize
    A4
    A5
End Enum

Public Class PrintFrm
    Private Const Lf As String = vbCrLf
    Private connectionString As String = "Data Source=DESKTOP-S7FRNAL\SQLEXPRESS;Initial Catalog=Verses_Find;Integrated Security=True"
    Public Property dt As Object

    Private Sub PrintFrm_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Dim Print As New PrintFrm
        Me.TopMost = True
        Me.WindowState = FormWindowState.Maximized
        'TODO: This line of code loads data into the 'Verses_FindDataSet4.TxtColor' table. You can move, or remove it, as needed.
        Me.TxtColorTableAdapter.Fill(Me.Verses_FindDataSet4.TxtColor)
        'TODO: This line of code loads data into the 'Verses_FindDataSet3.CSize' table. You can move, or remove it, as needed.
        Me.CSizeTableAdapter.Fill(Me.Verses_FindDataSet3.CSize)

        For Each oFont As FontFamily In FontFamily.Families
            cboFont.Items.Add(oFont.Name)
        Next




    End Sub
    Private Sub btnPasteVerse_Click(sender As Object, e As EventArgs) Handles btnPasteVerse.Click
        ' Determine if there is any text in the Clipboard to paste into the text box.
        If Clipboard.GetDataObject().GetDataPresent(DataFormats.Text) = True Then
            ' Determine if any text is selected in the text box.
            If txbVerse.SelectionLength > 0 Then
                ' Ask user if they want to paste over currently selected text.
                If MessageBox.Show("Do you want to paste over current selection?",
                    "Cut Example", MessageBoxButtons.YesNo) = DialogResult.No Then
                    ' Move selection to the point after the current selection and paste.
                    txbVerse.SelectionStart = txbVerse.SelectionStart +
                        txbVerse.SelectionLength
                End If
            End If
            ' Paste current text in Clipboard into text box.
            txbVerse.Paste()
        End If
    End Sub

    Private Sub txbVerse_TextChanged(sender As Object, e As EventArgs) Handles txbVerse.TextChanged
        Dim FSize As Single
        FSize = 24
        txbVerse.Font = New Font(cboFont.Text, FSize, FontStyle.Regular)
        MessageBox.Show(Replace(txbVerse.Text, Chr(13) & Chr(10), " VBCrLf "))
        Dim cboVal1 As String
        Dim lstVal2 As Integer
        Dim cboVal3 As String
        Dim boxX As Integer
        Dim boxY As Integer
        Dim cellw As Integer
        Dim cellh As Integer
        Dim sql As String = Nothing
        Dim sqlAdaptor As SqlDataAdapter
        Dim dt As New DataTable
        Dim CID As Integer
        Dim ort As String
        Dim Narrative As String
        Narrative = Nothing
        ort = Nothing

        Using connection As New SqlConnection(connectionString)
            connection.Open()
            Dim selectStatement = $"Select CID, BoxX, BoxY, Cellw, Cellh, Size, ort, Narrative From CSize Where CID = {cboCSize}"
            sqlAdaptor = New SqlDataAdapter(selectStatement, connection)
            dt = New DataTable()
            sqlAdaptor.Fill(dt)
            MessageBox.Show(Narrative, "Card Size")
        End Using

        Dim document As PdfDocument
        ' Create a new PDF document
        document = New PdfDocument()
        document.Info.Title = "Created with PDFsharp"

        ' Create an empty page
        Dim page As PdfPage = document.AddPage
        If ort = "L" Then
            page.Orientation = CType(pageOrientation.Landscape, PdfSharp.PageOrientation)
            page.Width = XUnit.FromMillimeter(297)
            page.Height = XUnit.FromMillimeter(210)
        Else
            page.Orientation = CType(pageOrientation.Portrait, PdfSharp.PageOrientation)
            page.Width = XUnit.FromMillimeter(210)
            page.Height = XUnit.FromMillimeter(297)

        End If

        ' Draw the text
        Dim Ftext As String = txbVerse.Text
        Dim Font As String = Nothing

        cboVal1 = CStr(cboFont.SelectedValue)
        lstVal2 = CInt(lstFSize.SelectedValue)
        cboVal3 = CStr(cboColor.SelectedValue)

        Dim gfx As XGraphics
        gfx = XGraphics.FromPdfPage(page)
        Dim Cfont As XFont = New XFont("French Script MT", 20, XFontStyle.Regular)
        Dim tf As XTextFormatter
        tf = New XTextFormatter(gfx)
        Dim FColor As String = cboVal3
        Dim rect As XRect
        rect = New XRect(boxX, boxY, cellw, cellh)
        gfx.DrawRectangle(XBrushes.SeaShell, rect)
        tf.Alignment = XParagraphAlignment.Center
        tf.DrawString(Ftext, Cfont, XBrushes.Blue, rect, XStringFormats.TopLeft)

        ' Save the document
        Dim filename As String = "verse.pdf"
        document.Save(filename)

        ' ...and start a viewer.
        Process.Start(filename)
    End Sub

    Private Sub btnClose3_Click(sender As Object, e As EventArgs) Handles btnClose3.Click
        Close()
    End Sub
End Class

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Can anyone see why it hangs?

It's not for us to read your code and tell you where it hangs. That's what debugging is for. Run the code and step through it and then it will be obvious where it hangs... because it will hang. Code hanging is either an infinite loop or a method that doesn't return and either will be obvious if you do what you should have done already and debug your code. If you don't know how to debug using breakpoints, now would be the perfect time to learn. If you can't debug then you can't write software.

Once you know where the issue is and what it is, if you don't know how to fix, THEN would be the time to ask a question. You can then provide ALL the relevant information, including what data was in use at the time, which you will also be able to determine from a proper debugging session.