diff --git a/src/common/logging/vst3.cpp b/src/common/logging/vst3.cpp
index bae28b1e..3fa80143 100644
--- a/src/common/logging/vst3.cpp
+++ b/src/common/logging/vst3.cpp
@@ -297,11 +297,16 @@ bool Vst3Logger::log_request(bool is_host_vst,
     });
 }
 
+bool Vst3Logger::log_request(bool is_host_vst,
+                             const YaPlugView::GetSize& request) {
+    return log_request_base(is_host_vst, [&](auto& message) {
+        message << request.owner_instance_id << ": IPlugView::getSize(size*)";
+    });
+}
+
 bool Vst3Logger::log_request(bool is_host_vst,
                              const YaPlugView::OnSize& request) {
     return log_request_base(is_host_vst, [&](auto& message) {
-        // This static cast is technically not correct of course but it's
-        // UTF-16, so everything's allowed
         message << request.owner_instance_id
                 << ": IPlugView::onSize(newSize = <ViewRect* with left = "
                 << request.new_size.left << ", top = " << request.new_size.top
@@ -311,9 +316,10 @@ bool Vst3Logger::log_request(bool is_host_vst,
 }
 
 bool Vst3Logger::log_request(bool is_host_vst,
-                             const YaPlugView::GetSize& request) {
+                             const YaPlugView::OnFocus& request) {
     return log_request_base(is_host_vst, [&](auto& message) {
-        message << request.owner_instance_id << ": IPlugView::getSize(size*)";
+        message << request.owner_instance_id << ": IPlugView::onFucus(state = "
+                << (request.state ? "true" : "false") << ")";
     });
 }
 
diff --git a/src/common/logging/vst3.h b/src/common/logging/vst3.h
index 668f54da..a14fd01e 100644
--- a/src/common/logging/vst3.h
+++ b/src/common/logging/vst3.h
@@ -94,8 +94,9 @@ class Vst3Logger {
     bool log_request(bool is_host_vst, const YaPlugView::OnWheel&);
     bool log_request(bool is_host_vst, const YaPlugView::OnKeyDown&);
     bool log_request(bool is_host_vst, const YaPlugView::OnKeyUp&);
-    bool log_request(bool is_host_vst, const YaPlugView::OnSize&);
     bool log_request(bool is_host_vst, const YaPlugView::GetSize&);
+    bool log_request(bool is_host_vst, const YaPlugView::OnSize&);
+    bool log_request(bool is_host_vst, const YaPlugView::OnFocus&);
     bool log_request(bool is_host_vst, const YaPluginBase::Initialize&);
     bool log_request(bool is_host_vst, const YaPluginBase::Terminate&);
     bool log_request(bool is_host_vst, const YaPluginFactory::Construct&);
diff --git a/src/common/serialization/vst3.h b/src/common/serialization/vst3.h
index 4ec3be88..79e54485 100644
--- a/src/common/serialization/vst3.h
+++ b/src/common/serialization/vst3.h
@@ -83,8 +83,9 @@ using ControlRequest = std::variant<Vst3PlugViewProxy::Destruct,
                                     YaPlugView::OnWheel,
                                     YaPlugView::OnKeyDown,
                                     YaPlugView::OnKeyUp,
-                                    YaPlugView::OnSize,
                                     YaPlugView::GetSize,
+                                    YaPlugView::OnSize,
+                                    YaPlugView::OnFocus,
                                     YaPluginBase::Initialize,
                                     YaPluginBase::Terminate,
                                     YaPluginFactory::Construct,
diff --git a/src/common/serialization/vst3/plug-view/plug-view.h b/src/common/serialization/vst3/plug-view/plug-view.h
index bc9535d2..752d0e66 100644
--- a/src/common/serialization/vst3/plug-view/plug-view.h
+++ b/src/common/serialization/vst3/plug-view/plug-view.h
@@ -256,6 +256,25 @@ class YaPlugView : public Steinberg::IPlugView {
 
     virtual tresult PLUGIN_API
     onSize(Steinberg::ViewRect* newSize) override = 0;
+
+    /**
+     * Message to pass through a call to `IPlugView::onFocus(state)` to the Wine
+     * plugin host.
+     */
+    struct OnFocus {
+        using Response = UniversalTResult;
+
+        native_size_t owner_instance_id;
+
+        TBool state;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.value8b(owner_instance_id);
+            s.value1b(state);
+        }
+    };
+
     virtual tresult PLUGIN_API onFocus(TBool state) override = 0;
     virtual tresult PLUGIN_API
     setFrame(Steinberg::IPlugFrame* frame) override = 0;
diff --git a/src/plugin/bridges/vst3-impls/plug-view-proxy.cpp b/src/plugin/bridges/vst3-impls/plug-view-proxy.cpp
index 7e840fe0..f7fb1fd9 100644
--- a/src/plugin/bridges/vst3-impls/plug-view-proxy.cpp
+++ b/src/plugin/bridges/vst3-impls/plug-view-proxy.cpp
@@ -116,9 +116,8 @@ tresult PLUGIN_API Vst3PlugViewProxyImpl::onSize(Steinberg::ViewRect* newSize) {
 }
 
 tresult PLUGIN_API Vst3PlugViewProxyImpl::onFocus(TBool state) {
-    // TODO: Implement
-    bridge.logger.log("TODO: IPlugView::onFocus()");
-    return Steinberg::kNotImplemented;
+    return bridge.send_message(YaPlugView::OnFocus{
+        .owner_instance_id = owner_instance_id(), .state = state});
 }
 
 tresult PLUGIN_API
diff --git a/src/wine-host/bridges/vst3.cpp b/src/wine-host/bridges/vst3.cpp
index 240e5cc8..7ef4440c 100644
--- a/src/wine-host/bridges/vst3.cpp
+++ b/src/wine-host/bridges/vst3.cpp
@@ -387,10 +387,6 @@ void Vst3Bridge::run() {
                     .plug_view->onKeyUp(request.key, request.key_code,
                                         request.modifiers);
             },
-            [&](YaPlugView::OnSize& request) -> YaPlugView::OnKeyUp::Response {
-                return object_instances[request.owner_instance_id]
-                    .plug_view->onSize(&request.new_size);
-            },
             [&](YaPlugView::GetSize& request) -> YaPlugView::GetSize::Response {
                 const tresult result =
                     object_instances[request.owner_instance_id]
@@ -399,6 +395,15 @@ void Vst3Bridge::run() {
                 return YaPlugView::GetSizeResponse{
                     .result = result, .updated_size = request.size};
             },
+            [&](YaPlugView::OnSize& request) -> YaPlugView::OnSize::Response {
+                return object_instances[request.owner_instance_id]
+                    .plug_view->onSize(&request.new_size);
+            },
+            [&](const YaPlugView::OnFocus& request)
+                -> YaPlugView::OnFocus::Response {
+                return object_instances[request.owner_instance_id]
+                    .plug_view->onFocus(request.state);
+            },
             [&](YaPluginBase::Initialize& request)
                 -> YaPluginBase::Initialize::Response {
                 // If we got passed a host context, we'll create a proxy object