This is the stdafx.h file that I use to begin my WTL version 8.0 projects. I've found this is a good general purpose starting point for most projects.

// stdafx.h : include file for standard system include files,
//  or project specific include files that are used frequently, but
//      are changed infrequently
//

#pragma once
#undef _ATL_MIN_CRT

// Change these values for different versions of Windows
#define WINVER		0x0501
#define _WIN32_WINNT	0x0501
#define _WIN32_IE	0x0501
#define _RICHEDIT_VER	0x0300

// Definitions I use when mixing WTL 8.0 with the latest version of ATL
#define _ATL_USE_CSTRING
// some CString constructors will be explicit
#define _ATL_CSTRING_EXPLICIT_CONSTRUCTORS
#define _ATL_USE_CSTRING_FLOAT
#define _ATL_USE_DDX_FLOAT
#define _ATL_NO_OLD_NAMES
#define _ATL_DISABLE_DEPRECATED
#define _ATL_ALL_WARNINGS
#define _ATL_NO_OLD_HEADERS_WIN64
#define _WTL_NEW_PAGE_NOTIFY_HANDLERS

// I like to use CoInitializeEx when possible
#define _WIN32_DCOM

#include <atlbase.h>
#include <atlapp.h>

extern CAppModule _Module;

#include <atlwin.h>

#include <atlframe.h>
#include <atlctrls.h>
#include <atldlgs.h>
#include <atlcrack.h>
#include <atlmisc.h>
#include <atlddx.h>

// This is for some auxiliary calls, it has nothing to do with WTL/ATL
#include <initguid.h>

// The following lines are broken for formatting purposes.
#if defined _M_IX86
  #pragma comment(linker, "/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' 
  version='6.0.0.0' processorArchitecture='x86' publicKeyToken='6595b64144ccf1df' language='*'\"")
#elif defined _M_IA64
  #pragma comment(linker, "/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' 
  version='6.0.0.0' processorArchitecture='ia64' publicKeyToken='6595b64144ccf1df' language='*'\"")
#elif defined _M_X64
  #pragma comment(linker, "/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' 
  version='6.0.0.0' processorArchitecture='amd64' publicKeyToken='6595b64144ccf1df' language='*'\"")
#else
  #pragma comment(linker, "/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' 
  version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")
#endif