diff --git a/examples/Cargo.toml b/examples/Cargo.toml
index ac98cb1..b41ec63 100644
--- a/examples/Cargo.toml
+++ b/examples/Cargo.toml
@@ -161,6 +161,10 @@ path = "split_pane_layout/main.rs"
 name = "tree_view"
 path = "tree_view/main.rs"
 
+[[bin]]
+name = "win_level_request"
+path = "win_level_request/main.rs"
+
 [[bin]]
 name = "win_widget"
 path = "win_widget/main.rs"
diff --git a/examples/win_level_request/main.rs b/examples/win_level_request/main.rs
new file mode 100644
index 0000000..0e75c2d
--- /dev/null
+++ b/examples/win_level_request/main.rs
@@ -0,0 +1,20 @@
+use tlib::winit::window::WindowLevel;
+use tmui::{application::Application, application_window::ApplicationWindow, prelude::*};
+
+fn main() {
+    log4rs::init_file("examples/log4rs.yaml", Default::default()).unwrap();
+
+    let app = Application::builder()
+        .width(1280)
+        .height(800)
+        .title("")
+        .build();
+
+    app.connect_activate(build_ui);
+
+    app.run();
+}
+
+fn build_ui(window: &mut ApplicationWindow) {
+    window.register_run_after(move |win| win.set_window_level(WindowLevel::AlwaysOnTop));
+}
diff --git a/tmui/src/application_window.rs b/tmui/src/application_window.rs
index 90f32b2..e815c98 100644
--- a/tmui/src/application_window.rs
+++ b/tmui/src/application_window.rs
@@ -43,7 +43,7 @@ use tlib::{
     object::{ObjectImpl, ObjectSubclass},
     skia_safe::ClipOp,
     values::FromValue,
-    winit::window::WindowId,
+    winit::window::{WindowId, WindowLevel},
 };
 
 use self::animation::frame_animator::{FrameAnimatorMgr, ReflectFrameAnimator};
@@ -307,7 +307,7 @@ impl ApplicationWindow {
     }
 
     #[inline]
-    pub fn register_run_after<R: 'static + FnOnce(&mut Self) + Send>(&mut self, run_after: R) {
+    pub fn register_run_after<R: 'static + FnOnce(&mut Self)>(&mut self, run_after: R) {
         self.run_after = Some(Box::new(run_after));
     }
 
@@ -375,6 +375,16 @@ impl ApplicationWindow {
         self.send_message(Message::WindowRestoreRequest(self.winit_id.unwrap()))
     }
 
+    #[inline]
+    pub fn set_window_level(&mut self, level: WindowLevel) {
+        if self.platform_type == PlatformType::Ipc {
+            error!("Can not restore window on slave side of shared memory application.");
+            return;
+        }
+
+        self.send_message(Message::WindowLevelRequest(self.winit_id.unwrap(), level))
+    }
+
     #[inline]
     pub fn window_layout_change(&mut self) {
         Self::layout_of(self.id()).layout_change(self, false)
diff --git a/tmui/src/primitive/message.rs b/tmui/src/primitive/message.rs
index 3f8cf69..2ad0056 100644
--- a/tmui/src/primitive/message.rs
+++ b/tmui/src/primitive/message.rs
@@ -8,7 +8,7 @@ use tlib::{
     object::ObjectId,
     payload::PayloadWeight,
     prelude::SystemCursorShape,
-    winit::window::WindowId,
+    winit::window::{WindowId, WindowLevel},
 };
 
 #[allow(clippy::large_enum_variant)]
@@ -50,6 +50,9 @@ pub(crate) enum Message {
     /// Request window position.
     WindowPositionRequest(WindowId, Point),
 
+    /// Request window level.
+    WindowLevelRequest(WindowId, WindowLevel),
+
     /// Sub window calling response.
     WindowResponse(
         WindowId,
@@ -123,6 +126,11 @@ impl Debug for Message {
                 .field(arg0)
                 .field(arg1)
                 .finish(),
+            Self::WindowLevelRequest(arg0, arg1) => f
+                .debug_tuple("WindowLevelRequest")
+                .field(arg0)
+                .field(arg1)
+                .finish(),
             Self::WindowResponse(arg0, _) => f.debug_tuple("WindowResponse").field(arg0).finish(),
             Self::WindowMoved(arg0, arg1) => f
                 .debug_tuple("WindowMoved")
diff --git a/tmui/src/runtime/windows_process.rs b/tmui/src/runtime/windows_process.rs
index 5eff1ec..f24dc7d 100644
--- a/tmui/src/runtime/windows_process.rs
+++ b/tmui/src/runtime/windows_process.rs
@@ -648,6 +648,13 @@ impl<'a, T: 'static + Copy + Send + Sync, M: 'static + Copy + Send + Sync>
                                 window.winit_window().set_outer_position(PhysicalPosition::new(pos.x(), pos.y()));
                             }
 
+                            Message::WindowLevelRequest(window_id, level) => {
+                                let window = self.windows.get(&window_id.into()).unwrap_or_else(|| {
+                                    panic!("Can not find window with id {:?}", window_id)
+                                });
+                                window.winit_window().set_window_level(level);
+                            }
+
                             Message::WindowResponse(window_id, closure) => {
                                 let window = self.windows.get(&window_id.into()).unwrap_or_else(|| {
                                     panic!("Can not find window with id {:?}", window_id)