try coexist with walk

example/example.manifest

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+    <assemblyIdentity version="1.0.0.0" processorArchitecture="*" name="Lantern" type="win32"/>
+    <dependency>
+        <dependentAssembly>
+            <assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls" version="6.0.0.0" processorArchitecture="*" publicKeyToken="6595b64144ccf1df" language="*"/>
+        </dependentAssembly>
+    </dependency>
+    <application xmlns="urn:schemas-microsoft-com:asm.v3">
+        <windowsSettings>
+            <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2, PerMonitor</dpiAwareness>
+            <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">True</dpiAware>
+        </windowsSettings>
+    </application>
+</assembly>

example/main.go

@@ -1,24 +1,53 @@
 package main
 
 import (
+	"flag"
 	"fmt"
 	"io/ioutil"
 	"time"
 
+	"github.com/lxn/walk"
+
 	"github.com/getlantern/systray"
 	"github.com/getlantern/systray/example/icon"
 	"github.com/skratchdot/open-golang/open"
 )
 
+var (
+	webview = flag.Bool("webview", false, "show a webview window along with the systray")
+)
+
 func main() {
+	flag.Parse()
 	onExit := func() {
-		fmt.Println("Starting onExit")
 		now := time.Now()
 		ioutil.WriteFile(fmt.Sprintf(`on_exit_%d.txt`, now.UnixNano()), []byte(now.String()), 0644)
-		fmt.Println("Finished onExit")
 	}
-	// Should be called at the very beginning of main().
-	systray.Run(onReady, onExit)
+
+	if *webview {
+		systray.Register(onExit)
+		onReady()
+		mainWindow, err := walk.NewMainWindow()
+		if err != nil {
+			panic(fmt.Sprintf("Failed to create main window: %v\n", err))
+		}
+		mainWindow.SetTitle("Webview")
+		mainWindow.SetWidth(800)
+		mainWindow.SetHeight(600)
+		layout := walk.NewVBoxLayout()
+		if err := mainWindow.SetLayout(layout); err != nil {
+			panic(fmt.Sprintf("Failed to set layout: %v\n", err))
+		}
+		webView, err := walk.NewWebView(mainWindow)
+		if err != nil {
+			panic(fmt.Sprintf("Failed to create webview window: %v\n", err))
+		}
+		webView.SetURL("https://www.getlantern.org")
+		mainWindow.SetVisible(true)
+		mainWindow.Run()
+	} else {
+		systray.Run(onReady, onExit)
+	}
 }
 
 func onReady() {

systray.go

@@ -103,6 +103,22 @@ func Run(onReady func(), onExit func()) {
 	nativeLoop()
 }
 
+func Register(onExit func()) {
+	runtime.LockOSThread()
+	atomic.StoreInt64(&hasStarted, 1)
+	// unlike onReady, onExit runs in the event loop to make sure it has time to
+	// finish before the process terminates
+	if onExit == nil {
+		onExit = func() {}
+	}
+	systrayExit = onExit
+	register()
+}
+
+func Run2() {
+	run()
+}
+
 // Quit the systray
 func Quit() {
 	if atomic.LoadInt64(&hasStarted) == 1 && atomic.CompareAndSwapInt64(&hasQuit, 0, 1) {

systray_windows.go

@@ -238,6 +238,7 @@ func (t *winTray) wndProc(hWnd windows.Handle, message uint32, wParam, lParam ui
 	const (
 		WM_COMMAND    = 0x0111
 		WM_DESTROY    = 0x0002
+		WM_CLOSE      = 0x0010
 		WM_ENDSESSION = 0x16
 		WM_RBUTTONUP  = 0x0205
 		WM_LBUTTONUP  = 0x0202
@@ -249,6 +250,9 @@ func (t *winTray) wndProc(hWnd windows.Handle, message uint32, wParam, lParam ui
 		if menuItemId != 0 {
 			systrayMenuItemSelected(menuItemId)
 		}
+	case WM_CLOSE:
+		pDestroyWindow.Call(uintptr(t.window))
+		t.wcex.unregister()
 	case WM_DESTROY:
 		// same as WM_ENDSESSION, but throws 0 exit code after all
 		defer pPostQuitMessage.Call(uintptr(int32(0)))
@@ -709,6 +713,12 @@ func (t *winTray) iconToBitmap(hIcon windows.Handle) (windows.Handle, error) {
 }
 
 func nativeLoop() {
+	register()
+	go systrayReady()
+	run()
+}
+
+func register() {
 	if err := wt.initInstance(); err != nil {
 		log.Errorf("Unable to init instance: %v", err)
 		return
@@ -719,13 +729,9 @@ func nativeLoop() {
 		return
 	}
 
-	defer func() {
-		pDestroyWindow.Call(uintptr(wt.window))
-		wt.wcex.unregister()
-	}()
-
-	go systrayReady()
+}
 
+func run() {
 	// Main message pump.
 	m := &struct {
 		WindowHandle windows.Handle