Web Sayfasının Kodunu Almak

Imports System.IO
Imports System.Runtime.InteropServices

Public Class Form1
    Private Const WM_DRAWCLIPBOARD As Integer = &H308
    Private Const WM_CHANGECBCHAIN As Integer = &H30D
    Private mNextClipBoardViewerHWnd As IntPtr
    Private Event OnClipboardChanged()

    <DllImport("user32")> _
    Private Shared Function SetClipboardViewer(ByVal hWnd As IntPtr) As IntPtr
    End Function

    <DllImport("user32")> _
    Private Shared Function ChangeClipboardChain(ByVal hWnd As IntPtr, ByVal hWndNext As IntPtr) As _
    <MarshalAs(UnmanagedType.Bool)> Boolean
    End Function

    <DllImport("user32")> _
    Private Shared Function SendMessage(ByVal hWnd As IntPtr, ByVal msg As Integer, ByVal wParam As IntPtr, _
    ByVal lParam As IntPtr) As IntPtr
    End Function
    Protected Overrides Sub WndProc(ByRef m As Message)
        Select Case m.Msg
            Case WM_DRAWCLIPBOARD
                RaiseEvent OnClipboardChanged()
                SendMessage(mNextClipBoardViewerHWnd, m.Msg, m.WParam, m.LParam)

            Case WM_CHANGECBCHAIN
                If m.WParam.Equals(mNextClipBoardViewerHWnd) Then
                    mNextClipBoardViewerHWnd = m.LParam
                Else
                    SendMessage(mNextClipBoardViewerHWnd, m.Msg, m.WParam, m.LParam)
                End If
        End Select
        MyBase.WndProc(m)
    End Sub

    Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
        Dim kaynakkod As String
        Dim data As StreamReader
        Dim webRequest As Net.WebRequest
        Dim webresponse As Net.WebResponse
        webRequest = Net.WebRequest.Create(LinTxt.Text)
        webresponse = webRequest.GetResponse()
        data = New StreamReader(webresponse.GetResponseStream())
        kaynakkod = data.ReadToEnd()
        RTB.Text = kaynakkod
    End Sub

    Private Sub ClipBoardChanged()
        If My.Computer.Clipboard.ContainsText Then
            If Uri.IsWellFormedUriString(My.Computer.Clipboard.GetText, UriKind.Absolute) Then
                LinTxt.Text = (My.Computer.Clipboard.GetText)
            End If
        End If
    End Sub
    Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
        mNextClipBoardViewerHWnd = SetClipboardViewer(Me.Handle)
        AddHandler Me.OnClipboardChanged, AddressOf ClipBoardChanged
    End Sub

    Private Sub Form1_FormClosing(sender As System.Object, e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing
           ChangeClipboardChain(Me.Handle, mNextClipBoardViewerHWnd)
    End Sub

    Private Sub LinTxt_TextChanged(sender As System.Object, e As System.EventArgs) Handles LinTxt.TextChanged
        Try
            Button1.PerformClick()
        Catch ex As Exception
            Debug.WriteLine(ex.Message)
            MessageBox.Show(ex.Message)
            Debug.WriteLine(ex.StackTrace)
        End Try

    End Sub
End Class