diff --git a/README.md b/README.md
index 75fbfbed..4a3f0937 100644
--- a/README.md
+++ b/README.md
@@ -16,8 +16,8 @@ This branch is still very far removed from being in a usable state. Below is an
 imcomplete list of things that still have to be done before this can be used:
 
 - Left to implement:
-  - `IHostApplication` implementations for both `IPluginBase::initialize()` as
-    well as for `IPluginFactory3::setHostContext()`.
+  - `YaHostApplicationHostImpl::createComponent`.
+  - `IPluginFactory3::setHostContext()` using the same host application context proxy method.
   - The rest of `IComponent`'s functions after implementing `intialize()`
   - `IPluginFactory3::setHostContext()`
   - All other mandatory interfaces
diff --git a/meson.build b/meson.build
index b6b09d2a..17f46217 100644
--- a/meson.build
+++ b/meson.build
@@ -116,6 +116,7 @@ if with_vst3
     'src/common/serialization/vst3/component.cpp',
     'src/common/serialization/vst3/host-application.cpp',
     'src/common/serialization/vst3/plugin-factory.cpp',
+    'src/wine-host/bridges/vst3-impls/host-application.cpp',
     'src/wine-host/bridges/vst3.cpp',
   ]
 endif
diff --git a/src/common/serialization/vst3/host-application.h b/src/common/serialization/vst3/host-application.h
index 9f2e989a..6a88644f 100644
--- a/src/common/serialization/vst3/host-application.h
+++ b/src/common/serialization/vst3/host-application.h
@@ -94,7 +94,7 @@ class YaHostApplication : public Steinberg::Vst::IHostApplication {
      * and we also track a `YaHostApplicationHostImpl` for the component with
      * instance id `x`, then that should also be dropped.
      */
-    ~YaHostApplication();
+    virtual ~YaHostApplication();
 
     DECLARE_FUNKNOWN_METHODS
 
diff --git a/src/wine-host/bridges/vst3-impls/host-application.cpp b/src/wine-host/bridges/vst3-impls/host-application.cpp
new file mode 100644
index 00000000..b53e5b73
--- /dev/null
+++ b/src/wine-host/bridges/vst3-impls/host-application.cpp
@@ -0,0 +1,47 @@
+// yabridge: a Wine VST bridge
+// Copyright (C) 2020  Robbert van der Helm
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#include "host-application.h"
+
+#include <iostream>
+
+YaHostApplicationHostImpl::YaHostApplicationHostImpl(
+    Vst3Bridge& bridge,
+    YaHostApplication::ConstructArgs&& args)
+    : YaHostApplication(std::move(args)), bridge(bridge) {
+    // The lifecycle is thos object is managed together with that of the
+    // `IComponent` instance this belongs to
+}
+
+tresult PLUGIN_API
+YaHostApplicationHostImpl::queryInterface(const Steinberg::TUID _iid,
+                                          void** obj) {
+    const tresult result = YaHostApplication::queryInterface(_iid, obj);
+    if (result != Steinberg::kResultOk) {
+        std::cerr << "TODO: Implement unknown interface logging on Wine side"
+                  << std::endl;
+    }
+
+    return result;
+}
+
+tresult PLUGIN_API
+YaHostApplicationHostImpl::createInstance(Steinberg::TUID cid,
+                                          Steinberg::TUID _iid,
+                                          void** obj) {
+    // TODO: Implement
+    return Steinberg::kNotImplemented;
+}
diff --git a/src/wine-host/bridges/vst3-impls/host-application.h b/src/wine-host/bridges/vst3-impls/host-application.h
new file mode 100644
index 00000000..c9c302f9
--- /dev/null
+++ b/src/wine-host/bridges/vst3-impls/host-application.h
@@ -0,0 +1,41 @@
+// yabridge: a Wine VST bridge
+// Copyright (C) 2020  Robbert van der Helm
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include <pluginterfaces/vst/ivsthostapplication.h>
+
+#include "../vst3.h"
+
+class YaHostApplicationHostImpl : public YaHostApplication {
+   public:
+    YaHostApplicationHostImpl(Vst3Bridge& bridge,
+                              YaHostApplication::ConstructArgs&& args);
+
+    /**
+     * We'll override the query interface to log queries for interfaces we do
+     * not (yet) support.
+     */
+    tresult PLUGIN_API queryInterface(const Steinberg::TUID _iid,
+                                      void** obj) override;
+
+    tresult PLUGIN_API createInstance(Steinberg::TUID cid,
+                                      Steinberg::TUID _iid,
+                                      void** obj) override;
+
+   private:
+    Vst3Bridge& bridge;
+};