Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/HydraulicLocationConfigurationDatabaseUpdateHandler.cs
===================================================================
diff -u -r115427a54b9613bc94bb2ad873c232e725c48284 -r3b3fa6dd98a09b88cb6f211f3e56ac1fafcc01f2
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/HydraulicLocationConfigurationDatabaseUpdateHandler.cs	(.../HydraulicLocationConfigurationDatabaseUpdateHandler.cs)	(revision 115427a54b9613bc94bb2ad873c232e725c48284)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/HydraulicLocationConfigurationDatabaseUpdateHandler.cs	(.../HydraulicLocationConfigurationDatabaseUpdateHandler.cs)	(revision 3b3fa6dd98a09b88cb6f211f3e56ac1fafcc01f2)
@@ -19,11 +19,15 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
 using System.Collections.Generic;
+using System.Windows.Forms;
 using Core.Common.Base;
 using Ringtoets.Common.Data.Hydraulics;
 using Ringtoets.HydraRing.IO.HydraulicLocationConfigurationDatabase;
 using Ringtoets.Integration.IO.Handlers;
+using Ringtoets.Integration.Plugin.Properties;
+using CoreCommonBaseResources = Core.Common.Base.Properties.Resources;
 
 namespace Ringtoets.Integration.Plugin.Handlers
 {
@@ -34,14 +38,17 @@
     {
         public bool InquireConfirmation()
         {
-            throw new System.NotImplementedException();
+            DialogResult result = MessageBox.Show(Resources.HydraulicLocationConfigurationDatabaseUpdateHandler_Confirm_clear_hydraulicLocationConfigurationDatabase_dependent_data,
+                                                  CoreCommonBaseResources.Confirm,
+                                                  MessageBoxButtons.OKCancel);
+            return result == DialogResult.OK;
         }
 
         public IEnumerable<IObservable> Update(HydraulicBoundaryDatabase hydraulicBoundaryDatabase,
                                                ReadHydraulicLocationConfigurationDatabaseSettings readHydraulicLocationConfigurationDatabaseSettings,
                                                string hlcdFilePath)
         {
-            throw new System.NotImplementedException();
+            throw new NotImplementedException();
         }
     }
 }
\ No newline at end of file
Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Properties/Resources.Designer.cs
===================================================================
diff -u -r82bd67cbda97ba7d3752b92b7e642135eba30601 -r3b3fa6dd98a09b88cb6f211f3e56ac1fafcc01f2
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 82bd67cbda97ba7d3752b92b7e642135eba30601)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 3b3fa6dd98a09b88cb6f211f3e56ac1fafcc01f2)
@@ -352,6 +352,18 @@
         }
         
         /// <summary>
+        ///   Looks up a localized string similar to U heeft een ander HLCD bestand geselecteerd. Als gevolg hiervan moet de uitvoer van alle HB berekeningen verwijderd worden.
+        ///
+        ///Wilt u doorgaan?.
+        /// </summary>
+        public static string HydraulicLocationConfigurationDatabaseUpdateHandler_Confirm_clear_hydraulicLocationConfigurationDatabase_dependent_data {
+            get {
+                return ResourceManager.GetString("HydraulicLocationConfigurationDatabaseUpdateHandler_Confirm_clear_hydraulicLocati" +
+                        "onConfigurationDatabase_dependent_data", resourceCulture);
+            }
+        }
+        
+        /// <summary>
         ///   Looks up a localized string similar to Na het importeren van een aangepaste ligging van de referentielijn zullen alle geïmporteerde en berekende gegevens van alle toetssporen worden gewist.
         ///
         ///Wilt u doorgaan?.
Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Properties/Resources.resx
===================================================================
diff -u -r82bd67cbda97ba7d3752b92b7e642135eba30601 -r3b3fa6dd98a09b88cb6f211f3e56ac1fafcc01f2
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Properties/Resources.resx	(.../Resources.resx)	(revision 82bd67cbda97ba7d3752b92b7e642135eba30601)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Properties/Resources.resx	(.../Resources.resx)	(revision 3b3fa6dd98a09b88cb6f211f3e56ac1fafcc01f2)
@@ -229,4 +229,9 @@
   <data name="HydraulicBoundaryDatabase_file_filter_Description" xml:space="preserve">
     <value>Hydraulische belastingendatabase</value>
   </data>
+  <data name="HydraulicLocationConfigurationDatabaseUpdateHandler_Confirm_clear_hydraulicLocationConfigurationDatabase_dependent_data" xml:space="preserve">
+    <value>U heeft een ander HLCD bestand geselecteerd. Als gevolg hiervan moet de uitvoer van alle HB berekeningen verwijderd worden.
+
+Wilt u doorgaan?</value>
+  </data>
 </root>
\ No newline at end of file
Index: Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/Handlers/HydraulicLocationConfigurationDatabaseUpdateHandlerTest.cs
===================================================================
diff -u -rc14610150a92e51bb9c1df0b7468fca4109ae7cc -r3b3fa6dd98a09b88cb6f211f3e56ac1fafcc01f2
--- Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/Handlers/HydraulicLocationConfigurationDatabaseUpdateHandlerTest.cs	(.../HydraulicLocationConfigurationDatabaseUpdateHandlerTest.cs)	(revision c14610150a92e51bb9c1df0b7468fca4109ae7cc)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/Handlers/HydraulicLocationConfigurationDatabaseUpdateHandlerTest.cs	(.../HydraulicLocationConfigurationDatabaseUpdateHandlerTest.cs)	(revision 3b3fa6dd98a09b88cb6f211f3e56ac1fafcc01f2)
@@ -19,14 +19,16 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
+using NUnit.Extensions.Forms;
 using NUnit.Framework;
 using Ringtoets.Integration.IO.Handlers;
 using Ringtoets.Integration.Plugin.Handlers;
 
 namespace Ringtoets.Integration.Plugin.Test.Handlers
 {
     [TestFixture]
-    public class HydraulicLocationConfigurationDatabaseUpdateHandlerTest
+    public class HydraulicLocationConfigurationDatabaseUpdateHandlerTest : NUnitFormTest
     {
         [Test]
         public void Constructor_ExpectedValues()
@@ -37,5 +39,43 @@
             // Assert
             Assert.IsInstanceOf<IHydraulicLocationConfigurationDatabaseUpdateHandler>(handler);
         }
+
+        [Test]
+        [TestCase(true)]
+        [TestCase(false)]
+        public void InquireConfirmation_ClickDialog_ReturnsExpectedResult(bool clickOk)
+        {
+            // Setup
+            string dialogTitle = null, dialogMessage = null;
+            DialogBoxHandler = (name, wnd) =>
+            {
+                var tester = new MessageBoxTester(wnd);
+                dialogTitle = tester.Title;
+                dialogMessage = tester.Text;
+                if (clickOk)
+                {
+                    tester.ClickOk();
+                }
+                else
+                {
+                    tester.ClickCancel();
+                }
+            };
+
+            var handler = new HydraulicLocationConfigurationDatabaseUpdateHandler();
+
+            // Call
+            bool result = handler.InquireConfirmation();
+
+            // Assert
+            Assert.AreEqual(clickOk, result);
+
+            Assert.AreEqual("Bevestigen", dialogTitle);
+            Assert.AreEqual("U heeft een ander HLCD bestand geselecteerd. Als gevolg hiervan moet de uitvoer van alle HB berekeningen verwijderd worden." +
+                            Environment.NewLine +
+                            Environment.NewLine +
+                            "Wilt u doorgaan?",
+                            dialogMessage);
+        }
     }
 }
\ No newline at end of file