Index: src/ch/ch.cpp
===================================================================
diff -u -rbbc540e8b070fde1b46ea307ded73f47590bc0d8 -r1beb1d8feacc2517287b975f27ad5f521fa1c954
--- src/ch/ch.cpp	(.../ch.cpp)	(revision bbc540e8b070fde1b46ea307ded73f47590bc0d8)
+++ src/ch/ch.cpp	(.../ch.cpp)	(revision 1beb1d8feacc2517287b975f27ad5f521fa1c954)
@@ -359,7 +359,7 @@
 		return ::HtmlHelp(hwndCaller, pszPath, uCommand, dwData);
 }
 
-void CCopyHandlerApp::HtmlHelp(DWORD_PTR dwData, UINT nCmd)
+void CCopyHandlerApp::HtmlHelp(UINT nCmd, DWORD_PTR dwData)
 {
 	switch (nCmd)
 	{
Index: src/ch/ch.h
===================================================================
diff -u -rbbc540e8b070fde1b46ea307ded73f47590bc0d8 -r1beb1d8feacc2517287b975f27ad5f521fa1c954
--- src/ch/ch.h	(.../ch.h)	(revision bbc540e8b070fde1b46ea307ded73f47590bc0d8)
+++ src/ch/ch.h	(.../ch.h)	(revision 1beb1d8feacc2517287b975f27ad5f521fa1c954)
@@ -53,7 +53,7 @@
 	virtual BOOL InitInstance();
 	//}}AFX_VIRTUAL
 
-	virtual void HtmlHelp(DWORD_PTR dwData, UINT nCmd);
+	virtual void HtmlHelp(UINT nCmd, DWORD_PTR dwData);
 
 	PCTSTR GetHelpPath() const { return m_pszHelpFilePath; };