test_pnpeventdlg.cpp

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// Test_PnPEventDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Test_PnPEvent.h"
#include "Test_PnPEventDlg.h"

#include <setupapi.h>
#include <winioctl.h>

#include "..\PnPEventioctl.h"
#include "..\PnPEventDeviceinterface.h"	// Has class GUID definition
GUID ClassGuid = PnPEventDevice_CLASS_GUID;

// This function is found in module OpenByIntf.cpp
HANDLE OpenByInterface(GUID* pClassGuid, DWORD instance, PDWORD pError);

GUID GUID_INTERFACE_PNPEVENT = PnPEventDevice_CLASS_GUID;

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CTest_PnPEventDlg dialog

CTest_PnPEventDlg::CTest_PnPEventDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CTest_PnPEventDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CTest_PnPEventDlg)
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	m_hInterfaceNotification = NULL;
	m_hHandleNotification = NULL;
	m_hDevice = INVALID_HANDLE_VALUE;
}
CTest_PnPEventDlg::~CTest_PnPEventDlg()
{							// CTestDlg::CTestDlg
	if (m_hInterfaceNotification)
		UnregisterDeviceNotification(m_hInterfaceNotification);
	if (m_hHandleNotification)
		UnregisterDeviceNotification(m_hHandleNotification);
	if (m_hDevice != INVALID_HANDLE_VALUE)
		CloseHandle(m_hDevice);
}							// CTestDlg::CTestDlg

void CTest_PnPEventDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CTest_PnPEventDlg)
	DDX_Control(pDX, IDC_SENDEVENT, m_Sendevent);
	DDX_Control(pDX, IDC_EVENTS, m_Events);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTest_PnPEventDlg, CDialog)
	//{{AFX_MSG_MAP(CTest_PnPEventDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_DEVICECHANGE()
	ON_BN_CLICKED(IDC_SENDEVENT, OnSendEvent)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTest_PnPEventDlg message handlers

BOOL CTest_PnPEventDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	DEV_BROADCAST_DEVICEINTERFACE filter;
	filter.dbcc_size = sizeof(filter);
	filter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
	filter.dbcc_classguid = GUID_INTERFACE_PNPEVENT;
	m_hInterfaceNotification = RegisterDeviceNotification(GetSafeHwnd(), &filter, DEVICE_NOTIFY_WINDOW_HANDLE);
	//注册窗口通知，当允许或禁止特定GUID接口时系统向此窗口发送一个
	//WM_DEVICECHANGE消息。

	DWORD Error;
	m_hDevice = OpenByInterface( &ClassGuid, 0, &Error);

	if (m_hDevice == INVALID_HANDLE_VALUE)
	{
		MessageBox("设备打不开", "错误", MB_OK | MB_ICONHAND);
		return TRUE;
	}

	DEV_BROADCAST_HANDLE filter1 = {0};
	filter1.dbch_size = sizeof(filter1);
	filter1.dbch_devicetype = DBT_DEVTYP_HANDLE;
	filter1.dbch_handle = m_hDevice;
	m_hHandleNotification = RegisterDeviceNotification(GetSafeHwnd(), &filter1, DEVICE_NOTIFY_WINDOW_HANDLE);
	//注册其它PnP设备变化通知消息

	m_Sendevent.EnableWindow(TRUE);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CTest_PnPEventDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CTest_PnPEventDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

BOOL CTest_PnPEventDlg::HandleDeviceChange(DWORD evtype, PDEV_BROADCAST_DEVICEINTERFACE dip)
{	//处理允许或禁止特定GUID接口窗口通知
	CString devname = dip->dbcc_name;
	CString msg;

	switch (evtype)
	{	// process device interface notification

	case DBT_DEVICEARRIVAL:
		OnNewDevice(devname, &dip->dbcc_classguid);
		break;

	case DBT_DEVICEREMOVECOMPLETE:
		{	// DBT_DEVICEREMOVECOMPLETE
			msg.Format("Device %s removed", (LPCTSTR) devname);
			m_Events.AddString(msg);
			break;
		}	// DBT_DEVICEREMOVECOMPLETE

	}	// process device interface notification
	return TRUE;
}

BOOL CTest_PnPEventDlg::HandleDeviceChange(DWORD evtype, PDEV_BROADCAST_HANDLE dhp)
{	//处理其它PnP设备变化通知
	CString msg;

	if (dhp->dbch_handle != m_hDevice)
		return TRUE;	// notification for some other handle

	switch (evtype)
	{	// process handle notification

	case DBT_DEVICEQUERYREMOVE:
		msg.Format("DBT_DEVICEQUERYREMOVE");
		m_Events.AddString(msg);
		if (MessageBox("同意删除设备吗?", "删除查询", MB_YESNO) != IDYES)
			return BROADCAST_QUERY_DENY;	//不同意删除设备
		
		if (m_hHandleNotification)
			UnregisterDeviceNotification(m_hHandleNotification);
		m_hHandleNotification = NULL;
		//注销其它PnP设备变化通知
		if (m_hDevice != INVALID_HANDLE_VALUE)
			CloseHandle(m_hDevice);
		m_hDevice = INVALID_HANDLE_VALUE;
		m_Sendevent.EnableWindow(FALSE);
		break;

	case DBT_DEVICEREMOVEPENDING:
		msg.Format("DBT_DEVICEREMOVEPENDING");
		m_Events.AddString(msg);
		break;

	case DBT_DEVICEQUERYREMOVEFAILED:
		msg.Format("DBT_DEVICEQUERYREMOVEFAILED");
		m_Events.AddString(msg);
		break;

	case DBT_CUSTOMEVENT:	//定制通知
		msg.Format("DBT_CUSTOMEVENT");
		m_Events.AddString(msg);
		break;

	}	// process handle notification

	return TRUE;
}

///////////////////////////////////////////////////////////////////////////////
BOOL CTest_PnPEventDlg::OnDeviceChange(UINT nEventType, DWORD dwData)
{	//WM_DEVICECHANGE消息处理函数
	if (!dwData) return TRUE;

	_DEV_BROADCAST_HDR* p = (_DEV_BROADCAST_HDR*) dwData;

	if (p->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE)
		return HandleDeviceChange(nEventType, (PDEV_BROADCAST_DEVICEINTERFACE) p);
	else if (p->dbch_devicetype == DBT_DEVTYP_HANDLE)
		return HandleDeviceChange(nEventType, (PDEV_BROADCAST_HANDLE) p);
	else
		return TRUE;
}

VOID CTest_PnPEventDlg::OnNewDevice(const CString& devname, const GUID* guid)
{
	CString msg;

	if (m_hDevice != INVALID_HANDLE_VALUE)
	{	// only supports 1 instance
		msg.Format("This test program can only handle one instance of PNPEVENT at a time.\n"
			"Therefore, the arrival of a new instance named \n%s is being ignored.",
			(LPCTSTR) devname);
		MessageBox(msg, "Warning", MB_OK | MB_ICONEXCLAMATION);
		return;
	}	// only supports 1 instance

	msg.Format("Device %s arrived", (LPCTSTR) devname);
	m_Events.AddString(msg);

	DWORD Error;
	m_hDevice = OpenByInterface( &ClassGuid, 0, &Error);

	if (m_hDevice == INVALID_HANDLE_VALUE)
		{
			MessageBox("设备打不开", "错误", MB_OK | MB_ICONHAND);
			return;
		}

	DEV_BROADCAST_HANDLE filter = {0};
	filter.dbch_size = sizeof(filter);
	filter.dbch_devicetype = DBT_DEVTYP_HANDLE;
	filter.dbch_handle = m_hDevice;
	m_hHandleNotification = RegisterDeviceNotification(GetSafeHwnd(), &filter, DEVICE_NOTIFY_WINDOW_HANDLE);
	//注册其它PnP设备变化通知消息
	
	m_Sendevent.EnableWindow(TRUE);
}

void CTest_PnPEventDlg::OnSendEvent() 
{
	DWORD junk;
	if (m_hDevice == INVALID_HANDLE_VALUE) return;
	DeviceIoControl(m_hDevice, PNPEVENT_IOCTL_800, NULL, 0, NULL, 0, &junk, NULL);
	//强行让驱动程序产生一个定制通知
}