Add cursor hittest window functionality (#2232)

Co-authored-by: z4122 <412213484@qq.com>
Co-authored-by: Kirill Chibisov <contact@kchibisov.com>

src/platform_impl/windows/window.rs

@@ -361,6 +361,19 @@ impl Window {
         Ok(())
     }
 
+    #[inline]
+    pub fn set_cursor_hittest(&self, hittest: bool) -> Result<(), ExternalError> {
+        let window = self.window.clone();
+        let window_state = Arc::clone(&self.window_state);
+        self.thread_executor.execute_in_thread(move || {
+            WindowState::set_window_flags(window_state.lock(), window.0, |f| {
+                f.set(WindowFlags::IGNORE_CURSOR_EVENT, !hittest)
+            });
+        });
+
+        Ok(())
+    }
+
     #[inline]
     pub fn id(&self) -> WindowId {
         WindowId(self.hwnd())