2 files changed, 2 insertions, 0 deletions
diff --git a/include/cru/platform/gui/Window.h b/include/cru/platform/gui/Window.h
index f877545e..885c1250 100644
--- a/include/cru/platform/gui/Window.h
+++ b/include/cru/platform/gui/Window.h
@@ -44,6 +44,7 @@ struct NativeKeyEventArgs {
 // Represents a native window, which exposes some low-level events and
 // operations.
 struct INativeWindow : virtual IPlatformResource {
+  virtual bool IsCreated();
   virtual void Close() = 0;
 
   virtual INativeWindow* GetParent() = 0;
diff --git a/include/cru/platform/gui/xcb/Window.h b/include/cru/platform/gui/xcb/Window.h
index 560eab50..aa1b4fab 100644
--- a/include/cru/platform/gui/xcb/Window.h
+++ b/include/cru/platform/gui/xcb/Window.h
@@ -19,6 +19,7 @@ class XcbWindow : public XcbResource, public virtual INativeWindow {
   explicit XcbWindow(XcbUiApplication* application);
   ~XcbWindow() override;
 
+  bool IsCreated() override;
   void Close() override;
 
   INativeWindow* GetParent() override;