Index: src/ch/ch.h
===================================================================
diff -u -N -r1beb1d8feacc2517287b975f27ad5f521fa1c954 -r787ecfe9fd8f4f349d47b491ed507796f257595d
--- src/ch/ch.h	(.../ch.h)	(revision 1beb1d8feacc2517287b975f27ad5f521fa1c954)
+++ src/ch/ch.h	(.../ch.h)	(revision 787ecfe9fd8f4f349d47b491ed507796f257595d)
@@ -53,7 +53,7 @@
 	virtual BOOL InitInstance();
 	//}}AFX_VIRTUAL
 
-	virtual void HtmlHelp(UINT nCmd, DWORD_PTR dwData);
+	virtual void HtmlHelp(DWORD_PTR dwData, UINT nCmd);
 
 	PCTSTR GetHelpPath() const { return m_pszHelpFilePath; };