[idd] helper: split CWindow into base class and CNotifyWindow

idd/LGIddHelper/CNotifyWindow.h

@@ -0,0 +1,24 @@
+#pragma once
+#include "CWindow.h"
+
+#define WM_NOTIFY_ICON (WM_USER)
+
+class CNotifyWindow : public CWindow
+{
+  static UINT s_taskbarCreated;
+  static ATOM s_atom;
+
+  NOTIFYICONDATA m_iconData;
+  HMENU m_menu;
+
+  LRESULT onNotifyIcon(UINT uEvent, WORD wIconId, int x, int y);
+  void registerIcon();
+
+  virtual LRESULT handleMessage(UINT uMsg, WPARAM wParam, LPARAM lParam) override;
+  virtual LRESULT onCreate() override;
+
+public:
+  CNotifyWindow();
+  ~CNotifyWindow() override;
+  static bool registerClass();
+};