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Date: 2009oct11
Platform: win32
Language: C/C++

Q.  Why does my Visual C++ 6 program not compile in Visual C++ 7 ?
(Visual C++ 7 is part of Visual Studio 2005)

A.  Some prototypes changed from VC6 to VC7...
(Visual C++ 7 is part of Visual Studio 2005)

ON_MESSAGE(WM_SOMEMESSAGE, OnSomeMessage) vc6: didn't care vc7: afx_msg LRESULT OnSomeMessage(WPARAM, LPARAM);
ON_BN_CLICKED(IDC_MYBUTTON, OnMyButtonClicked) vc6: afx_msg LRESULT OnMyButtonClicked(WPARAM, LPARAM) vc7: afx_msg void OnMyButtonClicked();
ON_LBN_DBLCLK(IDC_LIST, OnDblclkList) vc6: afx_msg void OnDblclkList(NMHDR* pNMHDR, LRESULT* pResult); vc7: afx_msg void OnDblclkList(); // This is AFX_PMSG
ON_WM_COPYDATA() vc6: afx_msg LONG OnCopyData(CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct); vc7: afx_msg BOOL OnCopyData(CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct);
ON_NOTIFY_REFLECT_EX(NM_CUSTOMDRAW, OnCustomDraw) vc6: void afx_msg OnCustomDraw(NMHDR* pNMHDR, LRESULT* pResult); vc7: BOOL afx_msg OnCustomDraw(NMHDR* pNMHDR, LRESULT* pResult); // return TRUE only when you have processed the message
ON_WM_TIMER() vc6: afx_msg void OnTimer(int); vc7: afx_msg void OnTimer(UINT_PTR);
Probably others too.

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