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diff --git a/lib/wx/c_src/wxe_callback_impl.h b/lib/wx/c_src/wxe_callback_impl.h
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+++ b/lib/wx/c_src/wxe_callback_impl.h
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+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2014. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ */
+
+#ifndef _WXE_CALLBACK_IMPL_H
+#define	_WXE_CALLBACK_IMPL_H
+
+void pre_callback();
+void handle_event_callback(ErlDrvPort port, ErlDrvTermData process);
+
+class wxEPrintout : public wxPrintout
+{
+ public:
+ wxEPrintout(wxString Title, int onPrintP, int onPrepareP,
+	     int onBeginP, int onEndP,
+	     int onBeginD, int onEndD,
+	     int hasP, int getPageI, ErlDrvTermData Port) :
+    wxPrintout(Title),
+	onPrintPage(onPrintP), onPreparePrinting(onPrepareP),
+	onBeginPrinting(onBeginP), onEndPrinting(onEndP),
+	onBeginDocument(onBeginD), onEndDocument(onEndD), hasPage(hasP), getPageInfo(getPageI),
+	port(Port)
+	{ } ;
+
+    ~wxEPrintout();
+
+    bool OnBeginDocument(int startPage, int endPage);
+    void OnEndDocument();
+    void OnBeginPrinting();
+    void OnEndPrinting();
+
+    void OnPreparePrinting();
+
+    bool HasPage(int page);
+    bool OnPrintPage(int page);
+    void GetPageInfo(int *minPage, int *maxPage, int *pageFrom, int *pageTo);
+
+    int onPrintPage;
+    int onPreparePrinting;
+    int onBeginPrinting;
+    int onEndPrinting;
+    int onBeginDocument;
+    int onEndDocument;
+    int hasPage;
+    int getPageInfo;
+
+    ErlDrvTermData port;
+};
+
+void clear_cb(ErlDrvTermData port, int callback);
+
+// Implementation of wxListCtrlCompare
+struct callbackInfo {
+    ErlDrvTermData port;
+    int callbackID;
+};
+
+int wxCALLBACK wxEListCtrlCompare(long item1, long item2, long callbackInfoPtr);
+
+#endif