Try
            Dim myString As String = "This is a String from the ClipBoard"
          
            ' Sets the data into the Clipboard.
            Clipboard.SetDataObject(myString)
            Dim myDataObject As IDataObject = Clipboard.GetDataObject()
            ' Checks whether the format of the data is 'UnicodeText' or not.
            If myDataObject.GetDataPresent(DataFormats.UnicodeText) Then
                Console.WriteLine($"Data in 'UnicodeText' format:{myDataObject.GetData(DataFormats.UnicodeText)}")
            Else
                Console.WriteLine("No String information was contained in the clipboard.")
            End If
          
            ' Checks whether the format of the data is 'Text' or not.
            If myDataObject.GetDataPresent(DataFormats.Text) Then
                Dim clipString As String = CType(myDataObject.GetData(DataFormats.StringFormat), String)
                Console.WriteLine($"Data in 'Text' format:{clipString}")
            End If
        Catch e As Exception
            Console.WriteLine(e.Message)
        End Try
    End Sub
End Class

' 导入命名空间
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.java2s.com."
        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("java2s"), Len("java2s"))
        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)


        ' Make a DataObject.
        Dim data_object As New DataObject

        ' Add the data in various formats.
        data_object.SetData(DataFormats.Text, rchSource.Text)
 
        ' Copy data to the clipboard.
        Clipboard.SetDataObject(data_object)
    End Sub

End Class


<Global.Microsoft.VisualBasic.CompilerServices.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.ComponentModel.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