diff --git a/src/gtk/combobox.cpp b/src/gtk/combobox.cpp
index 27ad2e756c..1ced733efd 100644
--- a/src/gtk/combobox.cpp
+++ b/src/gtk/combobox.cpp
@@ -278,8 +278,8 @@ GtkWidget* wxComboBox::GetConnectWidget()
 GdkWindow* wxComboBox::GTKGetWindow(wxArrayGdkWindows& /* windows */) const
 {
 #ifdef __WXGTK3__
-    // no access to internal GdkWindows
-    return NULL;
+    GdkWindow* wxGTKFindWindow(GtkWidget* widget);
+    return wxGTKFindWindow(GTK_WIDGET(GetEntry()));
 #else
     return gtk_entry_get_text_window(GetEntry());
 #endif
diff --git a/src/gtk/notebook.cpp b/src/gtk/notebook.cpp
index 71ebdcf3a9..8ca5c034d9 100644
--- a/src/gtk/notebook.cpp
+++ b/src/gtk/notebook.cpp
@@ -594,7 +594,10 @@ GdkWindow *wxNotebook::GTKGetWindow(wxArrayGdkWindows& windows) const
 {
     windows.push_back(gtk_widget_get_window(m_widget));
 #ifdef __WXGTK3__
-    // no access to internal GdkWindows
+    GdkWindow* wxGTKFindWindow(GtkWidget* widget);
+    GdkWindow* window = wxGTKFindWindow(m_widget);
+    if (window)
+        windows.push_back(window);
 #else
     windows.push_back(GTK_NOTEBOOK(m_widget)->event_window);
 #endif
diff --git a/src/gtk/slider.cpp b/src/gtk/slider.cpp
index 17d8cf087c..37a7fd58a1 100644
--- a/src/gtk/slider.cpp
+++ b/src/gtk/slider.cpp
@@ -508,8 +508,8 @@ int wxSlider::GetLineSize() const
 GdkWindow *wxSlider::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 {
 #ifdef __WXGTK3__
-    // no access to internal GdkWindows
-    return NULL;
+    GdkWindow* wxGTKFindWindow(GtkWidget* widget);
+    return wxGTKFindWindow(m_scale);
 #else
     return GTK_RANGE(m_scale)->event_window;
 #endif
diff --git a/src/gtk/spinbutt.cpp b/src/gtk/spinbutt.cpp
index fd1ee2cb9d..cdb3bcaf39 100644
--- a/src/gtk/spinbutt.cpp
+++ b/src/gtk/spinbutt.cpp
@@ -174,12 +174,14 @@ void wxSpinButton::GtkEnableEvents() const
         (gpointer)gtk_value_changed, (void*) this);
 }
 
-GdkWindow *wxSpinButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
+GdkWindow *wxSpinButton::GTKGetWindow(wxArrayGdkWindows& windows) const
 {
 #ifdef __WXGTK3__
-    // no access to internal GdkWindows
+    void wxGTKFindWindow(GtkWidget* widget, wxArrayGdkWindows& windows);
+    wxGTKFindWindow(m_widget, windows);
     return NULL;
 #else
+    wxUnusedVar(windows);
     return GTK_SPIN_BUTTON(m_widget)->panel;
 #endif
 }
diff --git a/src/gtk/spinctrl.cpp b/src/gtk/spinctrl.cpp
index b036e0bdb0..07e466296c 100644
--- a/src/gtk/spinctrl.cpp
+++ b/src/gtk/spinctrl.cpp
@@ -342,8 +342,8 @@ void wxSpinCtrlGTKBase::OnChar( wxKeyEvent &event )
 GdkWindow *wxSpinCtrlGTKBase::GTKGetWindow(wxArrayGdkWindows& windows) const
 {
 #ifdef __WXGTK3__
-    // no access to internal GdkWindows
-    wxUnusedVar(windows);
+    void wxGTKFindWindow(GtkWidget* widget, wxArrayGdkWindows& windows);
+    wxGTKFindWindow(m_widget, windows);
 #else
     GtkSpinButton* spinbutton = GTK_SPIN_BUTTON(m_widget);
 
diff --git a/src/gtk/textctrl.cpp b/src/gtk/textctrl.cpp
index d1d298aab3..492502b286 100644
--- a/src/gtk/textctrl.cpp
+++ b/src/gtk/textctrl.cpp
@@ -1650,16 +1650,8 @@ GdkWindow *wxTextCtrl::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
     else
     {
 #ifdef __WXGTK3__
-        GdkWindow* window = gtk_widget_get_window(m_text);
-        for (const GList* p = gdk_window_peek_children(window); p; p = p->next)
-        {
-            window = GDK_WINDOW(p->data);
-            void* data;
-            gdk_window_get_user_data(window, &data);
-            if (data == m_text)
-                return window;
-        }
-        return NULL;
+        GdkWindow* wxGTKFindWindow(GtkWidget* widget);
+        return wxGTKFindWindow(m_text);
 #else
         return gtk_entry_get_text_window(GTK_ENTRY(m_text));
 #endif
diff --git a/src/gtk/window.cpp b/src/gtk/window.cpp
index 9658d7b109..a686e79757 100644
--- a/src/gtk/window.cpp
+++ b/src/gtk/window.cpp
@@ -4370,6 +4370,35 @@ bool wxWindowGTK::IsTransparentBackgroundSupported(wxString* reason) const
 #endif // wxGTK_HAS_COMPOSITING_SUPPORT/!wxGTK_HAS_COMPOSITING_SUPPORT
 }
 
+#ifdef __WXGTK3__
+GdkWindow* wxGTKFindWindow(GtkWidget* widget)
+{
+    GdkWindow* window = gtk_widget_get_window(widget);
+    for (const GList* p = gdk_window_peek_children(window); p; p = p->next)
+    {
+        window = GDK_WINDOW(p->data);
+        void* data;
+        gdk_window_get_user_data(window, &data);
+        if (data == widget)
+            return window;
+    }
+    return NULL;
+}
+
+void wxGTKFindWindow(GtkWidget* widget, wxArrayGdkWindows& windows)
+{
+    GdkWindow* window = gtk_widget_get_window(widget);
+    for (const GList* p = gdk_window_peek_children(window); p; p = p->next)
+    {
+        window = GDK_WINDOW(p->data);
+        void* data;
+        gdk_window_get_user_data(window, &data);
+        if (data == widget)
+            windows.push_back(window);
+    }
+}
+#endif // __WXGTK3__
+
 // ----------------------------------------------------------------------------
 // Pop-up menu stuff
 // ----------------------------------------------------------------------------