ADMIN/SDL/VERAG_PROG_ALLGEMEIN/Benutzerdefinierte Steuerelemente/WebbrowserEx.vb

'2007 KLEINMA
'www.zerosandtheone.com

Option Strict On
Imports System.Runtime.InteropServices
Imports System.Security.Permissions
Imports System.Windows.Forms

Namespace Kleinma.Controls

    Public Class WebBrowserEx
        Inherits WebBrowser

        Private cookie As AxHost.ConnectionPointCookie
        Private helper As WebBrowser2EventHelper

        'NEW EVENTS THAT WILL NOW BE EXPOSED
        Public Event NewWindow2 As WebBrowserNewWindow2EventHandler
        Public Event NavigateError As WebBrowserNavigateErrorEventHandler

        'DELEGATES TO HANDLE PROCESSING OF THE EVENTS
        Public Delegate Sub WebBrowserNewWindow2EventHandler(ByVal sender As Object, ByVal e As WebBrowserNewWindow2EventArgs)
        Public Delegate Sub WebBrowserNavigateErrorEventHandler(ByVal sender As Object, ByVal e As WebBrowserNavigateErrorEventArgs)

#Region " PROTECTED METHODS FOR EXTENDED EVENTS "
        Protected Overridable Sub OnNewWindow2(ByVal e As WebBrowserNewWindow2EventArgs)
            RaiseEvent NewWindow2(Me, e)
        End Sub

        Protected Overridable Sub OnNavigateError(ByVal e As WebBrowserNavigateErrorEventArgs)
            RaiseEvent NavigateError(Me, e)
        End Sub
#End Region

#Region "WB SINK ROUTINES"

        <PermissionSetAttribute(SecurityAction.LinkDemand, Name:="FullTrust")> _
        Protected Overrides Sub CreateSink()
            MyBase.CreateSink()
            helper = New WebBrowser2EventHelper(Me)
            cookie = New AxHost.ConnectionPointCookie(Me.ActiveXInstance, helper, GetType(DWebBrowserEvents2))
        End Sub

        <PermissionSetAttribute(SecurityAction.LinkDemand, Name:="FullTrust")> _
        Protected Overrides Sub DetachSink()
            If cookie IsNot Nothing Then
                cookie.Disconnect()
                cookie = Nothing
            End If
            MyBase.DetachSink()
        End Sub

#End Region

#Region "PROPERTIES EXPOSED THROUGH THE COM OBJECT"

        <System.ComponentModel.DesignerSerializationVisibility(System.ComponentModel.DesignerSerializationVisibility.Hidden)> _
    <System.Runtime.InteropServices.DispIdAttribute(200)> _
        Public ReadOnly Property Application() As Object
            Get
                If IsNothing(Me.ActiveXInstance) Then
                    Throw New AxHost.InvalidActiveXStateException("Application", AxHost.ActiveXInvokeKind.PropertyGet)
                End If

                Return CallByName(Me.ActiveXInstance, "Application", CallType.Get, Nothing)
                'THIS IS COMMENTED. UNCOMMENT AND REMOVE LINE BEFORE IF YOU CAN NOT USE CALLBYNAME()
                'Return Me.ActiveXInstance.Application
            End Get
        End Property

        <System.ComponentModel.DesignerSerializationVisibility(System.ComponentModel.DesignerSerializationVisibility.Hidden)> _
        <System.Runtime.InteropServices.DispIdAttribute(552)> _
        Public Property RegisterAsBrowser() As Boolean
            Get
                If IsNothing(Me.ActiveXInstance) Then
                    Throw New AxHost.InvalidActiveXStateException("RegisterAsBrowser", AxHost.ActiveXInvokeKind.PropertyGet)
                End If

                Dim RetVal As Boolean = False
                If Not Boolean.TryParse(CallByName(Me.ActiveXInstance, "RegisterAsBrowser", CallType.Get, Nothing).ToString, RetVal) Then RetVal = False
                Return RetVal
                'THIS IS COMMENTED. UNCOMMENT AND REMOVE 3 LINES BEFORE IF YOU CAN NOT USE CALLBYNAME()
                'Return Me.ActiveXInstance.RegisterAsBrowser

            End Get
            Set(ByVal value As Boolean)
                If IsNothing(Me.ActiveXInstance) Then
                    Throw New AxHost.InvalidActiveXStateException("RegisterAsBrowser", AxHost.ActiveXInvokeKind.PropertySet)
                End If

                CallByName(Me.ActiveXInstance, "RegisterAsBrowser", CallType.Let, True)
                'THIS IS COMMENTED. UNCOMMENT AND REMOVE LINE BEFORE IF YOU CAN NOT USE CALLBYNAME()
                'Me.ActiveXInstance.RegisterAsBrowser = value
            End Set
        End Property

#End Region

        'HELPER CLASS TO FIRE OFF THE EVENTS
        Private Class WebBrowser2EventHelper
            Inherits StandardOleMarshalObject
            Implements DWebBrowserEvents2

            Private parent As WebBrowserEx

            Public Sub New(ByVal parent As WebBrowserEx)
                Me.parent = parent
            End Sub


            Public Sub NewWindow2(ByRef ppDisp As Object, ByRef cancel As Boolean) Implements DWebBrowserEvents2.NewWindow2
                Dim e As New WebBrowserNewWindow2EventArgs(ppDisp)
                Me.parent.OnNewWindow2(e)
                ppDisp = e.ppDisp
                cancel = e.Cancel
            End Sub

            Public Sub NavigateError(ByVal pDisp As Object, ByRef URL As Object, ByRef frame As Object, ByRef statusCode As Object, ByRef cancel As Boolean) Implements DWebBrowserEvents2.NavigateError
                ' Raise the NavigateError event.
                Me.parent.OnNavigateError( _
                    New WebBrowserNavigateErrorEventArgs( _
                    CStr(URL), CStr(frame), CInt(statusCode), cancel))
            End Sub
        End Class



        ' Define constants from winuser.h
        Private Const WM_PARENTNOTIFY As Integer = &H210
        Private Const WM_DESTROY As Integer = 2

        'Define New event to fire
        Public Event WBWantsToClose()

        Protected Overrides Sub WndProc(ByRef m As Message)
            Select Case m.Msg
                Case WM_PARENTNOTIFY
                    If (Not DesignMode) Then
                        If (CInt(m.WParam) = WM_DESTROY) Then
                            ' Tell whoever cares we are closing
                            RaiseEvent WBWantsToClose()
                        End If
                    End If
                    DefWndProc(m)
                Case Else
                    MyBase.WndProc(m)
            End Select
        End Sub
    End Class


    Public Class WebBrowserNewWindow2EventArgs
        Inherits System.ComponentModel.CancelEventArgs

        Private ppDispValue As Object

        Public Sub New(ByVal ppDisp As Object)
            Me.ppDispValue = ppDisp
        End Sub

        Public Property ppDisp() As Object
            Get
                Return ppDispValue
            End Get
            Set(ByVal value As Object)
                ppDispValue = value
            End Set
        End Property

    End Class
    Public Class WebBrowserNavigateErrorEventArgs
        Inherits EventArgs

        Private urlValue As String
        Private frameValue As String
        Private statusCodeValue As Int32
        Private cancelValue As Boolean

        Public Sub New( _
            ByVal url As String, ByVal frame As String, _
            ByVal statusCode As Int32, ByVal cancel As Boolean)

            Me.urlValue = url
            Me.frameValue = frame
            Me.statusCodeValue = statusCode
            Me.cancelValue = cancel

        End Sub

        Public Property Url() As String
            Get
                Return urlValue
            End Get
            Set(ByVal value As String)
                urlValue = value
            End Set
        End Property

        Public Property Frame() As String
            Get
                Return frameValue
            End Get
            Set(ByVal value As String)
                frameValue = value
            End Set
        End Property

        Public Property StatusCode() As Int32
            Get
                Return statusCodeValue
            End Get
            Set(ByVal value As Int32)
                statusCodeValue = value
            End Set
        End Property

        Public Property Cancel() As Boolean
            Get
                Return cancelValue
            End Get
            Set(ByVal value As Boolean)
                cancelValue = value
            End Set
        End Property

    End Class

    <ComImport(), Guid("34A715A0-6587-11D0-924A-0020AFC7AC4D"), _
    InterfaceType(ComInterfaceType.InterfaceIsIDispatch), _
    TypeLibType(TypeLibTypeFlags.FHidden)> _
    Public Interface DWebBrowserEvents2

        <DispId(DISPID.NEWWINDOW2)> Sub NewWindow2( _
            <InAttribute(), OutAttribute(), MarshalAs(UnmanagedType.IDispatch)> ByRef ppDisp As Object, _
            <InAttribute(), OutAttribute()> ByRef cancel As Boolean)

        <DispId(DISPID.NAVIGATERROR)> Sub NavigateError( _
            <InAttribute(), MarshalAs(UnmanagedType.IDispatch)> _
             ByVal pDisp As Object, _
            <InAttribute()> ByRef URL As Object, _
            <InAttribute()> ByRef frame As Object, _
            <InAttribute()> ByRef statusCode As Object, _
            <InAttribute(), OutAttribute()> ByRef cancel As Boolean)
    End Interface

    Public Enum DISPID
        NEWWINDOW2 = 251
        NAVIGATERROR = 271
    End Enum



End Namespace