diff --git a/demo/CheckListBox.py b/demo/CheckListBox.py
index 98221cdb..e8e248dd 100644
--- a/demo/CheckListBox.py
+++ b/demo/CheckListBox.py
@@ -15,7 +15,11 @@ class TestPanel(wx.Panel):
 
         wx.StaticText(self, -1, "This example uses the wxCheckListBox control.", (45, 15))
 
-        lb = wx.CheckListBox(self, -1, (80, 50), wx.DefaultSize, sampleList)
+        lb = wx.CheckListBox(self, -1, (80, 50)) #, choices=sampleList)
+        for txt in sampleList:
+            lb.Append(txt)
+
+        lb.SetSize(lb.GetBestSize())
         self.Bind(wx.EVT_LISTBOX, self.EvtListBox, lb)
         self.Bind(wx.EVT_CHECKLISTBOX, self.EvtCheckListBox, lb)
         lb.SetSelection(0)
diff --git a/etg/checklst.py b/etg/checklst.py
index 99e14279..cbd763fb 100644
--- a/etg/checklst.py
+++ b/etg/checklst.py
@@ -97,6 +97,11 @@ def run():
     c.addPyProperty('CheckedStrings GetCheckedStrings SetCheckedStrings')
 
 
+    tools.fixItemContainerClass(c)
+    c.addItem(etgtools.WigCode("""\
+        virtual int GetSelections(wxArrayInt& aSelections) const;
+        """))
+
     #-----------------------------------------------------------------
     tools.doCommonTweaks(module)
     tools.runGenerators(module)
diff --git a/etg/choice.py b/etg/choice.py
index 5164f55e..b3a581c2 100644
--- a/etg/choice.py
+++ b/etg/choice.py
@@ -39,6 +39,7 @@ def run():
     c.find('Create').findOverload('wxString choices').ignore()
     c.find('Create').findOverload('wxArrayString').find('choices').default = 'wxArrayString()'
 
+    tools.fixItemContainerClass(c, False)
     tools.fixWindowClass(c)
 
     module.addGlobalStr('wxChoiceNameStr', c)
diff --git a/etg/combo.py b/etg/combo.py
index f3326bfb..18577dea 100644
--- a/etg/combo.py
+++ b/etg/combo.py
@@ -64,6 +64,8 @@ def run():
     c.find('GetTextIndent').ignore()
     c.find('SetTextIndent').ignore()
 
+    #tools.fixItemContainerClass(c, False)
+
     #-----------------------------------------------------------------
     tools.doCommonTweaks(module)
     tools.runGenerators(module)
diff --git a/etg/htmllbox.py b/etg/htmllbox.py
index 67685085..593a8fab 100644
--- a/etg/htmllbox.py
+++ b/etg/htmllbox.py
@@ -64,13 +64,8 @@ def run():
     c.find('Create.choices').default = 'wxArrayString()'
 
     # let sip know that these pure virtuals have been implemented in this class
+    tools.fixItemContainerClass(c, False)
     c.addItem(etgtools.WigCode("""\
-        virtual unsigned int GetCount() const;
-        virtual wxString GetString(unsigned int n) const;
-        virtual void SetString(unsigned int n, const wxString & string);
-        virtual void SetSelection(int n);
-        virtual int GetSelection() const;
-
         protected:
         virtual wxString OnGetItem(size_t n) const;
         """))
diff --git a/etg/listbox.py b/etg/listbox.py
index f7345050..713b6a62 100644
--- a/etg/listbox.py
+++ b/etg/listbox.py
@@ -101,6 +101,11 @@ def run():
             #endif
             """)
 
+    tools.fixItemContainerClass(c)
+    c.addItem(etgtools.WigCode("""\
+        virtual int GetSelections(wxArrayInt& aSelections) const;
+        """))
+
 
     tools.fixWindowClass(c)
     module.addGlobalStr('wxListBoxNameStr', c)
diff --git a/etg/odcombo.py b/etg/odcombo.py
index ff440caa..e5e85c26 100644
--- a/etg/odcombo.py
+++ b/etg/odcombo.py
@@ -62,13 +62,8 @@ def run():
 
 
     # wxItemContainer pure virtuals that have an implementation in this class
+    tools.fixItemContainerClass(c, False)
     c.addItem(etgtools.WigCode("""\
-        virtual unsigned int GetCount() const;
-        virtual wxString GetString(unsigned int n) const;
-        virtual void SetString(unsigned int n, const wxString& s);
-        virtual int GetSelection() const;
-        virtual void SetSelection(int n);
-
         virtual wxString GetStringSelection() const;
         %MethodCode
             sipRes = new wxString(sipCpp->wxItemContainerImmutable::GetStringSelection());
diff --git a/etgtools/tweaker_tools.py b/etgtools/tweaker_tools.py
index db2898c8..e67975db 100644
--- a/etgtools/tweaker_tools.py
+++ b/etgtools/tweaker_tools.py
@@ -358,6 +358,26 @@ def fixBookctrlClass(klass):
         if not klass.findItem(name):
             klass.addItem(extractors.WigCode(decl))
 
+def fixItemContainerClass(klass, addIsSelected=True):
+    """
+    Add declarations of the pure virtual methods from the base class.
+    """
+    methods = [
+        ("GetCount", "virtual unsigned int GetCount() const;"),
+        ("GetString", "virtual wxString GetString(unsigned int n) const;"),
+        ("SetString", "virtual void SetString(unsigned int n, const wxString& s);"),
+        ("SetSelection", "virtual void SetSelection(int n);"),
+        ("GetSelection", "virtual int GetSelection() const;"),
+    ]
+    if addIsSelected:
+        methods += [
+            ("IsSelected", "virtual bool IsSelected(int n) const;"),
+            ]
+
+    for name, decl in methods:
+        if not klass.findItem(name):
+            klass.addItem(extractors.WigCode(decl))
+
 
 def fixHtmlSetFonts(klass):
     # Use wxArrayInt instead of a C array of ints.