VB.Net/GUI/Rtf format

Get Rtf format Data from a RichTextBox

Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 
End Class
Public Class Form1
    Private Sub frmDragRichText_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim txt As String = "www.vbex.ru."
        rchSource.Text = txt
        rchSource.Select(txt.IndexOf("www"), Len("www"))
        rchSource.SelectionFont = New Font(rchSource.SelectionFont, FontStyle.Italic)
        rchSource.Select(txt.IndexOf("."), Len("."))
        rchSource.SelectionFont = New Font(rchSource.SelectionFont, FontStyle.Bold)
        rchSource.SelectionColor = Color.Brown
        rchSource.Select(txt.IndexOf("vbex"), Len("vbex"))
        rchSource.SelectionFont = New Font(rchSource.SelectionFont, FontStyle.Bold)
        rchSource.SelectionColor = Color.Red
        rchSource.Select(txt.IndexOf("com"), Len("com"))
        rchSource.SelectionFont = New Font(rchSource.SelectionFont, FontStyle.Underline)
        rchSource.Select(0, 0)

        Console.WriteLine(rchSource.Rtf)
    End Sub
End Class

<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.IContainer
    "NOTE: The following procedure is required by the Windows Form Designer
    "It can be modified using the Windows Form Designer.  
    "Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.lblRtf = New System.Windows.Forms.Label
        Me.lblHtml = New System.Windows.Forms.Label
        Me.lblTarget = New System.Windows.Forms.Label
        Me.rchTarget = New System.Windows.Forms.RichTextBox
        Me.rchSource = New System.Windows.Forms.RichTextBox
        Me.SuspendLayout()
        "
        "lblRtf
        "
        Me.lblRtf.Anchor = CType(((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
        Me.lblRtf.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.lblRtf.Location = New System.Drawing.Point(0, 104)
        Me.lblRtf.Margin = New System.Windows.Forms.Padding(3, 3, 3, 1)
        Me.lblRtf.Name = "lblRtf"
        Me.lblRtf.Size = New System.Drawing.Size(296, 110)
        Me.lblRtf.TabIndex = 14
        "
        "lblHtml
        "
        Me.lblHtml.Anchor = CType(((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
        Me.lblHtml.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.lblHtml.Location = New System.Drawing.Point(0, 248)
        Me.lblHtml.Margin = New System.Windows.Forms.Padding(3, 2, 3, 3)
        Me.lblHtml.Name = "lblHtml"
        Me.lblHtml.Size = New System.Drawing.Size(296, 80)
        Me.lblHtml.TabIndex = 13
        "
        "lblTarget
        "
        Me.lblTarget.Anchor = CType(((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
        Me.lblTarget.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.lblTarget.Location = New System.Drawing.Point(0, 216)
        Me.lblTarget.Margin = New System.Windows.Forms.Padding(3, 1, 3, 2)
        Me.lblTarget.Name = "lblTarget"
        Me.lblTarget.Size = New System.Drawing.Size(296, 28)
        Me.lblTarget.TabIndex = 12
        "
        "rchTarget
        "
        Me.rchTarget.AllowDrop = True
        Me.rchTarget.Anchor = CType(((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
        Me.rchTarget.Location = New System.Drawing.Point(0, 72)
        Me.rchTarget.Name = "rchTarget"
        Me.rchTarget.Size = New System.Drawing.Size(296, 28)
        Me.rchTarget.TabIndex = 11
        Me.rchTarget.Text = ""
        "
        "rchSource
        "
        Me.rchSource.AllowDrop = True
        Me.rchSource.Anchor = CType(((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
        Me.rchSource.Location = New System.Drawing.Point(0, 0)
        Me.rchSource.Name = "rchSource"
        Me.rchSource.Size = New System.Drawing.Size(296, 28)
        Me.rchSource.TabIndex = 10
        Me.rchSource.Text = ""
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(296, 329)
        Me.Controls.Add(Me.lblRtf)
        Me.Controls.Add(Me.lblHtml)
        Me.Controls.Add(Me.lblTarget)
        Me.Controls.Add(Me.rchTarget)
        Me.Controls.Add(Me.rchSource)
        Me.Name = "Form1"
        Me.Text = "CopyPasteRichText"
        Me.ResumeLayout(False)
    End Sub
    Friend WithEvents lblRtf As System.Windows.Forms.Label
    Friend WithEvents lblHtml As System.Windows.Forms.Label
    Friend WithEvents lblTarget As System.Windows.Forms.Label
    Friend WithEvents rchTarget As System.Windows.Forms.RichTextBox
    Friend WithEvents rchSource As System.Windows.Forms.RichTextBox
End Class

Show RTF file

Imports System.Windows.Forms
Module Module1
    Sub Main()
        Application.Run(New Form1)
    End Sub
End Module
Public Class Form1
    Inherits System.Windows.Forms.Form
#Region " Windows Form Designer generated code "
    Public Sub New()
        MyBase.New()
        "This call is required by the Windows Form Designer.
        InitializeComponent()
        "Add any initialization after the InitializeComponent() call
    End Sub
    "Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.IContainer
    "NOTE: The following procedure is required by the Windows Form Designer
    "It can be modified using the Windows Form Designer.  
    "Do not modify it using the code editor.
    Friend WithEvents RichTextBox1 As System.Windows.Forms.RichTextBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.RichTextBox1 = New System.Windows.Forms.RichTextBox()
        Me.Button1 = New System.Windows.Forms.Button()
        Me.SuspendLayout()
        "
        "RichTextBox1
        "
        Me.RichTextBox1.Location = New System.Drawing.Point(16, 24)
        Me.RichTextBox1.Name = "RichTextBox1"
        Me.RichTextBox1.Size = New System.Drawing.Size(456, 368)
        Me.RichTextBox1.TabIndex = 0
        Me.RichTextBox1.Text = ""
        "
        "Button1
        "
        Me.Button1.Location = New System.Drawing.Point(192, 408)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(104, 23)
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "Open File"
        "
        "Form1
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(512, 453)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Button1, Me.RichTextBox1})
        Me.Name = "Form1"
        Me.Text = "ShowRTF"
        Me.ResumeLayout(False)
    End Sub
#End Region
    Private Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim FileDB As New OpenFileDialog()
        FileDB.Filter = "All files|*.*|RTF files|*.rtf"
        FileDB.FilterIndex = 2
        FileDB.InitialDirectory = "C:\Temp"
        If (FileDB.ShowDialog() = DialogResult.OK) Then
            Try
                RichTextBox1.LoadFile(FileDB.FileName)
            Catch
                MessageBox.Show("Error reading file")
            End Try
        Else
            MessageBox.Show("User selected Cancel")
        End If
    End Sub
End Class