c++ - error C1189 after installing Visual Studio 2010 -

i installed vs2010 after drive crash, prior had vs2005 , fine.

now on compiling c++ app fine seeing couple of errors cannot figure out.

error 1 error c1189: #error : file requires _win32_winnt #defined @ least 0x0403. value 0x0501 or higher recommended. c:\program files\microsoft visual studio 10.0\vc\atlmfc\include\atlcore.h 35 1 bioxgina

#ifndef __atlcore_h__ #define __atlcore_h__  #pragma once  #ifdef _atl_all_warnings #pragma warning( push ) #endif  #pragma warning(disable: 4786) // identifier truncated in debug information #pragma warning(disable: 4127) // constant expression  #include <atldef.h> #include <windows.h> #include <ole2.h>  #include <limits.h> #include <tchar.h> #include <mbstring.h>  #include <atlchecked.h> #include <atlsimpcoll.h>  34.  #if _win32_winnt < 0x0403 35.  #error file requires _win32_winnt #defined @ least 0x0403. value 0x0501 or higher recommended. 36.  #endif  #pragma pack(push,_atl_packing) namespace atl { ///////////////////////////////////////////////////////////////////////////// // verify null-terminated string points valid memory inline bool atlisvalidstring( _in_z_count_(nmaxlength) lpcwstr psz, _in_ size_t nmaxlength = int_max) { (nmaxlength); return (psz != null); } 

if comment out above lines,

error c3861 identifier not found on line 111 below.

i presume i'm getting because commented above lines ?

hresult init() throw() {     hresult hres = s_ok;  111.        if (!initializecriticalsectionandspincount(&m_sec, 0))     {         hres = hresult_from_win32(getlasterror());     }      return hres; } 

i appreciate assistance on this. don't want reinstall 2005.

this microsoft connect issue has potential solution:

edit file "stdafx.h" , change value defined _win32_winnt , winver 0x0502.

more discussion here error on msdn c++ forum: problem older vc solution.