diff --git a/Controls.DocumentViewer/DocumentViewer.vb b/Controls.DocumentViewer/DocumentViewer.vb
index 297d9903..85ea3400 100644
--- a/Controls.DocumentViewer/DocumentViewer.vb
+++ b/Controls.DocumentViewer/DocumentViewer.vb
@@ -48,6 +48,11 @@ Public Class DocumentViewer
         UpdateMainUi()
     End Sub
 
+    ''' <summary>
+    ''' Initialize the Viewer
+    ''' </summary>
+    ''' <param name="LogConfig">A LogConfig object</param>
+    ''' <param name="LicenseKey">The GDPicture.NET License Key</param>
     Public Sub Init(LogConfig As LogConfig, LicenseKey As String)
         _logConfig = LogConfig
         _logger = LogConfig.GetLogger()
@@ -56,6 +61,18 @@ Public Class DocumentViewer
         _licenseManager.RegisterKEY(_licenseKey)
     End Sub
 
+    ''' <summary>
+    ''' Terminate Viewer, freeing up resources and deleting temp files
+    ''' </summary>
+    Public Sub Done()
+        DeleteTempFiles()
+        Dispose()
+    End Sub
+
+    ''' <summary>
+    ''' Load a file and display it
+    ''' </summary>
+    ''' <param name="filepath"></param>
     Public Sub LoadFile(filepath As String)
         If _licenseKey = String.Empty Then
             _logger.Warn("License key was not provided. File {0} not loaded.", filepath)
@@ -74,7 +91,20 @@ Public Class DocumentViewer
         UpdateMainUi()
     End Sub
 
-    Public Sub DoLoadFile(FilePath As String)
+
+
+    Public Sub DeleteTempFiles()
+        For Each oFile In _TempFiles
+            Try
+                IO.File.Delete(oFile)
+            Catch ex As Exception
+                _logger.Warn("Could not delete temp file {0}", oFile)
+            End Try
+        Next
+        _TempFiles.Clear()
+    End Sub
+
+    Private Sub DoLoadFile(FilePath As String)
         Try
             Dim oFileInfo = New IO.FileInfo(FilePath)
             Dim oExtension As String = oFileInfo.Extension
@@ -497,12 +527,6 @@ Public Class DocumentViewer
     End Sub
 
     Private Sub DocumentViewer_Disposed(sender As Object, e As EventArgs) Handles Me.Disposed
-        For Each oFile In _TempFiles
-            Try
-                IO.File.Delete(oFile)
-            Catch ex As Exception
-                _logger.Warn("Could not delete temp file {0}", oFile)
-            End Try
-        Next
+        GdViewer.Dispose()
     End Sub
 End Class
diff --git a/GUIs.Test.DocumentViewerTest/App.config b/GUIs.Test.DocumentViewerTest/App.config
index 5534e287..5e0d90e6 100644
--- a/GUIs.Test.DocumentViewerTest/App.config
+++ b/GUIs.Test.DocumentViewerTest/App.config
@@ -1,6 +1,14 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <startup>
         <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
     </startup>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="Independentsoft.Msg" publicKeyToken="76be97fe952f1ec7" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-2.0.570.17147" newVersion="2.0.570.17147" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
 </configuration>
\ No newline at end of file
diff --git a/GUIs.Test.DocumentViewerTest/Form1.Designer.vb b/GUIs.Test.DocumentViewerTest/Form1.Designer.vb
index 58f6fa40..d4f299fe 100644
--- a/GUIs.Test.DocumentViewerTest/Form1.Designer.vb
+++ b/GUIs.Test.DocumentViewerTest/Form1.Designer.vb
@@ -22,21 +22,12 @@ Partial Class Form1
     'Das Bearbeiten mit dem Code-Editor ist nicht möglich.
     <System.Diagnostics.DebuggerStepThrough()> _
     Private Sub InitializeComponent()
-        Me.DocumentViewer1 = New DigitalData.Controls.DocumentViewer.DocumentViewer()
         Me.TextBox1 = New System.Windows.Forms.TextBox()
         Me.OpenFileDialog1 = New System.Windows.Forms.OpenFileDialog()
         Me.Button1 = New System.Windows.Forms.Button()
         Me.Button2 = New System.Windows.Forms.Button()
         Me.SuspendLayout()
         '
-        'DocumentViewer1
-        '
-        Me.DocumentViewer1.Dock = System.Windows.Forms.DockStyle.Bottom
-        Me.DocumentViewer1.Location = New System.Drawing.Point(0, 66)
-        Me.DocumentViewer1.Name = "DocumentViewer1"
-        Me.DocumentViewer1.Size = New System.Drawing.Size(800, 384)
-        Me.DocumentViewer1.TabIndex = 0
-        '
         'TextBox1
         '
         Me.TextBox1.Location = New System.Drawing.Point(12, 12)
@@ -74,15 +65,12 @@ Partial Class Form1
         Me.Controls.Add(Me.Button2)
         Me.Controls.Add(Me.Button1)
         Me.Controls.Add(Me.TextBox1)
-        Me.Controls.Add(Me.DocumentViewer1)
         Me.Name = "Form1"
         Me.Text = "Form1"
         Me.ResumeLayout(False)
         Me.PerformLayout()
 
     End Sub
-
-    Friend WithEvents DocumentViewer1 As DigitalData.Controls.DocumentViewer.DocumentViewer
     Friend WithEvents TextBox1 As TextBox
     Friend WithEvents OpenFileDialog1 As OpenFileDialog
     Friend WithEvents Button1 As Button
diff --git a/GUIs.Test.DocumentViewerTest/Form1.vb b/GUIs.Test.DocumentViewerTest/Form1.vb
index 4e6176a2..ce77568f 100644
--- a/GUIs.Test.DocumentViewerTest/Form1.vb
+++ b/GUIs.Test.DocumentViewerTest/Form1.vb
@@ -1,6 +1,8 @@
 Imports DigitalData.Modules.Logging
 
 Public Class Form1
+    Private oSubform As Form2
+
     Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
         Dim oResult = OpenFileDialog1.ShowDialog()
 
@@ -10,7 +12,8 @@ Public Class Form1
     End Sub
     Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
         Try
-            DocumentViewer1.LoadFile(TextBox1.Text)
+            oSubform.FilePath = TextBox1.Text
+            oSubform.ShowDialog()
         Catch ex As Exception
             MsgBox(ex.Message)
         End Try
@@ -19,6 +22,12 @@ Public Class Form1
     Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
         Dim oKey = "0467389434974657969312056"
         Dim oLogConfig As New LogConfig(LogConfig.PathType.CurrentDirectory)
-        DocumentViewer1.Init(oLogConfig, oKey)
+        oSubform = New Form2(oLogConfig, oKey)
     End Sub
+
+    Private Sub Form1_FormClosing(sender As Object, e As FormClosingEventArgs) Handles Me.FormClosing
+
+    End Sub
+
+
 End Class
diff --git a/GUIs.Test.DocumentViewerTest/Form2.Designer.vb b/GUIs.Test.DocumentViewerTest/Form2.Designer.vb
new file mode 100644
index 00000000..570729cc
--- /dev/null
+++ b/GUIs.Test.DocumentViewerTest/Form2.Designer.vb
@@ -0,0 +1,49 @@
+<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
+Partial Class Form2
+    Inherits System.Windows.Forms.Form
+
+    'Das Formular überschreibt den Löschvorgang, um die Komponentenliste zu bereinigen.
+    <System.Diagnostics.DebuggerNonUserCode()> _
+    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
+        Try
+            If disposing AndAlso components IsNot Nothing Then
+                components.Dispose()
+            End If
+        Finally
+            MyBase.Dispose(disposing)
+        End Try
+    End Sub
+
+    'Wird vom Windows Form-Designer benötigt.
+    Private components As System.ComponentModel.IContainer
+
+    'Hinweis: Die folgende Prozedur ist für den Windows Form-Designer erforderlich.
+    'Das Bearbeiten ist mit dem Windows Form-Designer möglich.  
+    'Das Bearbeiten mit dem Code-Editor ist nicht möglich.
+    <System.Diagnostics.DebuggerStepThrough()> _
+    Private Sub InitializeComponent()
+        Me.DocumentViewer1 = New DigitalData.Controls.DocumentViewer.DocumentViewer()
+        Me.SuspendLayout()
+        '
+        'DocumentViewer1
+        '
+        Me.DocumentViewer1.Dock = System.Windows.Forms.DockStyle.Fill
+        Me.DocumentViewer1.Location = New System.Drawing.Point(0, 0)
+        Me.DocumentViewer1.Name = "DocumentViewer1"
+        Me.DocumentViewer1.Size = New System.Drawing.Size(800, 450)
+        Me.DocumentViewer1.TabIndex = 0
+        '
+        'Form2
+        '
+        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
+        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
+        Me.ClientSize = New System.Drawing.Size(800, 450)
+        Me.Controls.Add(Me.DocumentViewer1)
+        Me.Name = "Form2"
+        Me.Text = "Form2"
+        Me.ResumeLayout(False)
+
+    End Sub
+
+    Friend WithEvents DocumentViewer1 As DigitalData.Controls.DocumentViewer.DocumentViewer
+End Class
diff --git a/GUIs.Test.DocumentViewerTest/Form2.resx b/GUIs.Test.DocumentViewerTest/Form2.resx
new file mode 100644
index 00000000..1af7de15
--- /dev/null
+++ b/GUIs.Test.DocumentViewerTest/Form2.resx
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>
\ No newline at end of file
diff --git a/GUIs.Test.DocumentViewerTest/Form2.vb b/GUIs.Test.DocumentViewerTest/Form2.vb
new file mode 100644
index 00000000..08004a54
--- /dev/null
+++ b/GUIs.Test.DocumentViewerTest/Form2.vb
@@ -0,0 +1,40 @@
+Imports System.ComponentModel
+Imports DigitalData.Modules.Logging
+
+Public Class Form2
+    Public FilePath As String
+    Private Key As String
+    Private LogConfig As LogConfig
+    Private Logger As Logger
+
+    Public Sub New(LogConfig As LogConfig, Key As String)
+        ' Dieser Aufruf ist für den Designer erforderlich.
+        InitializeComponent()
+
+        ' Fügen Sie Initialisierungen nach dem InitializeComponent()-Aufruf hinzu.
+        Me.LogConfig = LogConfig
+        Me.Key = Key
+    End Sub
+
+    Private Sub Form2_Load(sender As Object, e As EventArgs) Handles MyBase.Load
+        Logger = LogConfig.GetLogger
+        Logger.Info("DocumentViewer Form Loaded")
+        DocumentViewer1.Init(LogConfig, Key)
+        DocumentViewer1.LoadFile(FilePath)
+        Logger.Info("File Loaded")
+    End Sub
+
+    Private Sub Form2_FormClosed(sender As Object, e As FormClosedEventArgs) Handles Me.FormClosed
+        Logger.Info("Form closed")
+    End Sub
+
+    Private Sub Form2_FormClosing(sender As Object, e As FormClosingEventArgs) Handles Me.FormClosing
+
+        DocumentViewer1.Done()
+        Logger.Info("Form closing")
+
+
+    End Sub
+
+
+End Class
\ No newline at end of file
diff --git a/GUIs.Test.DocumentViewerTest/GUIs.Test.DocumentViewerTest.vbproj b/GUIs.Test.DocumentViewerTest/GUIs.Test.DocumentViewerTest.vbproj
index f0c23889..37b2c1e2 100644
--- a/GUIs.Test.DocumentViewerTest/GUIs.Test.DocumentViewerTest.vbproj
+++ b/GUIs.Test.DocumentViewerTest/GUIs.Test.DocumentViewerTest.vbproj
@@ -56,10 +56,19 @@
     <Reference Include="Independentsoft.Msg">
       <HintPath>P:\Visual Studio Projekte\Bibliotheken\MSG .NET\Bin\14_11_19_MIME_UTF_ENCODING\Independentsoft.Msg.dll</HintPath>
     </Reference>
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="NLog, Version=4.0.0.0, Culture=neutral, PublicKeyToken=5120e14c03d0593c, processorArchitecture=MSIL">
+      <HintPath>..\packages\NLog.4.6.8\lib\net45\NLog.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
+    <Reference Include="System.Configuration" />
     <Reference Include="System.Data" />
     <Reference Include="System.Deployment" />
     <Reference Include="System.Drawing" />
+    <Reference Include="System.IO.Compression" />
+    <Reference Include="System.Runtime.Serialization" />
+    <Reference Include="System.ServiceModel" />
+    <Reference Include="System.Transactions" />
     <Reference Include="System.Windows.Forms" />
     <Reference Include="System.Xml" />
     <Reference Include="System.Core" />
@@ -88,6 +97,12 @@
       <DependentUpon>Form1.vb</DependentUpon>
       <SubType>Form</SubType>
     </Compile>
+    <Compile Include="Form2.Designer.vb">
+      <DependentUpon>Form2.vb</DependentUpon>
+    </Compile>
+    <Compile Include="Form2.vb">
+      <SubType>Form</SubType>
+    </Compile>
     <Compile Include="My Project\AssemblyInfo.vb" />
     <Compile Include="My Project\Application.Designer.vb">
       <AutoGen>True</AutoGen>
@@ -108,6 +123,9 @@
     <EmbeddedResource Include="Form1.resx">
       <DependentUpon>Form1.vb</DependentUpon>
     </EmbeddedResource>
+    <EmbeddedResource Include="Form2.resx">
+      <DependentUpon>Form2.vb</DependentUpon>
+    </EmbeddedResource>
     <EmbeddedResource Include="My Project\Resources.resx">
       <Generator>VbMyResourcesResXFileCodeGenerator</Generator>
       <LastGenOutput>Resources.Designer.vb</LastGenOutput>
@@ -126,6 +144,7 @@
       <LastGenOutput>Settings.Designer.vb</LastGenOutput>
     </None>
     <None Include="App.config" />
+    <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Modules.Logging\Logging.vbproj">
diff --git a/GUIs.Test.DocumentViewerTest/packages.config b/GUIs.Test.DocumentViewerTest/packages.config
new file mode 100644
index 00000000..c1fd79a0
--- /dev/null
+++ b/GUIs.Test.DocumentViewerTest/packages.config
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="NLog" version="4.6.8" targetFramework="net461" />
+</packages>
\ No newline at end of file