diff --git a/etg/object.py b/etg/object.py
index 0fe8cae8..33d2fe08 100644
--- a/etg/object.py
+++ b/etg/object.py
@@ -49,7 +49,6 @@ def run():
     c.addPrivateCopyCtor()
     
     
-    
     #--------------------------------------------------
     c = module.find('wxObject')
     c.find('operator delete').ignore()
@@ -66,7 +65,25 @@ def run():
         doc='Deletes the C++ object this Python object is a proxy for.',
         transferThis=True)  # TODO: Check this
         
-        
+    # Teach SIP how to convert to specific class types
+    c.addItem(etgtools.WigCode("""\
+    %ConvertToSubClassCode
+        const wxClassInfo* info   = sipCpp->GetClassInfo();
+        wxString           name   = info->GetClassName();
+        bool               exists = sipFindType(name) != NULL;
+        while (info && !exists) {
+            info = info->GetBaseClass1();
+            name = info->GetClassName();
+            exists = sipFindType(name) != NULL;
+        }
+        if (info) 
+            sipType = sipFindType(name);
+        else
+            sipType = NULL;
+    %End
+    """))
+              
+              
     #-----------------------------------------------------------------
     tools.doCommonTweaks(module)
     tools.runGenerators(module)