VC2008 64bit error C2440: 'static_cast' : cannot convert from 'void (__cdecl CTestappDlg::* )(UINT)' to 'void (__cdecl CWnd::* )(UINT_PTR)' fix

Change in .h header file
afx_msg void OnTimer(UINT nIDEvent);
to
afx_msg void OnTimer(UINT_PTR nIDEvent);

and change in .cpp file
void <yourapp>::OnTimer(UINT nIDEvent)
to
void <yourapp>::OnTimer(UINT_PTR nIDEvent)