vb.net richtextbox print

To print the contents of a RichTextBox control in VB.NET, you can use the PrintDocument class and the PrintDialog control. Here's an example code:

Private Sub btnPrint_Click(sender As Object, e As EventArgs) Handles btnPrint.Click
    ' Initialize the PrintDocument object
    Dim pd As New PrintDocument()

    ' Set the PrintPage event handler
    AddHandler pd.PrintPage, AddressOf pd_PrintPage

    ' Display the PrintDialog control and get the user's choice
    Dim pdResult As DialogResult = PrintDialog1.ShowDialog()

    ' If the user clicks OK, print the document
    If pdResult = DialogResult.OK Then
        pd.Print()
    End If
End Sub

Private Sub pd_PrintPage(sender As Object, e As PrintPageEventArgs)
    ' Get the text from the RichTextBox control
    Dim text As String = RichTextBox1.Text

    ' Set the font and the margins
    Dim font As New Font("Arial", 12)
    Dim margins As New Margins(50, 50, 50, 50)

    ' Calculate the rectangle for the text
    Dim rect As New RectangleF(e.MarginBounds.Left, e.MarginBounds.Top, e.MarginBounds.Width, e.MarginBounds.Height)

    ' Print the text
    e.Graphics.DrawString(text, font, Brushes.Black, rect)

    ' If there is more text to print, set the HasMorePages property to True
    If RichTextBox1.TextLength > text.Length Then
        e.HasMorePages = True
    Else
        e.HasMorePages = False
    End If
End Sub

In this example, the `btnPrint_Click` event handler initializes a new PrintDocument object and sets the PrintPage event handler to `pd_PrintPage`. It then displays the PrintDialog control and gets the user's choice. If the user clicks OK, the document is printed using the `Print` method of the PrintDocument object.

The `pd_PrintPage` event handler gets the text from the RichTextBox control, sets the font and margins, and calculates the rectangle for the text. It then prints the text using the `DrawString` method of the Graphics object. If there is more text to print, it sets the HasMorePages property to True to indicate that another page is needed.