HID开发，'DEV_BROADCAST_DEVICEINTERFACE' : undeclared identifier

在人体输入学设备开发中，有时遇到

'DEV_BROADCAST_DEVICEINTERFACE' : undeclared identifier

的错误，

需要在stdafx.h中，添加

#define WINVER 0x0501

例如：

#if _MSC_VER > 1000#pragma once#endif // _MSC_VER > 1000#define VC_EXTRALEAN// Exclude rarely-used stuff from Windows headers#define WINVER 0x0501#include <afxwin.h>         // MFC core and standard components#include <afxext.h>         // MFC extensions#include <afxdisp.h>        // MFC Automation classes#include <afxdtctl.h>// MFC support for Internet Explorer 4 Common Controls#ifndef _AFX_NO_AFXCMN_SUPPORT#include <afxcmn.h>// MFC support for Windows Common Controls#endif // _AFX_NO_AFXCMN_SUPPORT