+bool wxComboBox::IsEditable() const
+{
+    return GetText() != NULL && (!HasFlag(wxCB_READONLY) || GetText()->IsEditable());
+}
+
+void wxComboBox::Undo()
+{
+    if (IsEditable())
+        GetText()->Undo();
+}
+
+void wxComboBox::Redo()
+{
+    if (IsEditable())
+        GetText()->Redo();
+}
+
+void wxComboBox::SelectAll()
+{
+    GetText()->SelectAll();
+}
+
+bool wxComboBox::CanCopy() const
+{
+    if (GetText() != NULL)
+        return GetText()->CanCopy();
+    else
+        return false;
+}
+
+bool wxComboBox::CanCut() const
+{
+    if (GetText() != NULL)
+        return GetText()->CanCut();
+    else
+        return false;
+}
+
+bool wxComboBox::CanPaste() const
+{
+    if (IsEditable())
+        return GetText()->CanPaste();
+    else
+        return false;
+}
+
+bool wxComboBox::CanUndo() const
+{
+    if (IsEditable())
+        return GetText()->CanUndo();
+    else
+        return false;
+}
+
+bool wxComboBox::CanRedo() const
+{
+    if (IsEditable())
+        return GetText()->CanRedo();
+    else
+        return false;
+}
+
+