mfc检测usb插拔事件

1.在OnInitDialog()函数添加注册代码，头文件#include （OnInitDialog()可以通过ctrl+shift+x添加）

static const GUID GUID_DEVINTERFACE_LIST[] ={ 0xA5DCBF10, 0x6530, 0x11D2, { 0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED } }

BOOL CTest::OnInitDialog()
{
	CDialogEx::OnInitDialog();
	HDEVNOTIFY hDevNotify;
	DEV_BROADCAST_DEVICEINTERFACE NotificationFilter;
	ZeroMemory( &NotificationFilter, sizeof(NotificationFilter) );
	NotificationFilter.dbcc_size = sizeof(DEV_BROADCAST_DEVICEINTERFACE);
	NotificationFilter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
	for(int i=0; iGetSafeHwnd(), &NotificationFilter, DEVICE_NOTIFY_WINDOW_HANDLE);
		if( !hDevNotify ) 
		{
			AfxMessageBox(CString("Can't register device notification: ") 
				+ _com_error(GetLastError()).ErrorMessage(), MB_ICONEXCLAMATION);
			return FALSE;
		}
	}


	return TRUE;  

}

2.添加ON_MESSAGE(WM_DEVICECHANGE, OnMyDeviceChange)

afx_msg LRESULT OnMyDeviceChange(WPARAM wParam, LPARAM lParam);

注意：必须注册否则无法检测到

LRESULT CTest::OnMyDeviceChange(WPARAM wParam, LPARAM lParam)
{
	if ( DBT_DEVICEARRIVAL == wParam || DBT_DEVICEREMOVECOMPLETE == wParam ) {
		PDEV_BROADCAST_HDR pHdr = (PDEV_BROADCAST_HDR)lParam;
		PDEV_BROADCAST_DEVICEINTERFACE pDevInf;
		PDEV_BROADCAST_HANDLE pDevHnd;
		PDEV_BROADCAST_OEM pDevOem;
		PDEV_BROADCAST_PORT pDevPort;
		PDEV_BROADCAST_VOLUME pDevVolume;
		switch( pHdr->dbch_devicetype ) {
		case DBT_DEVTYP_DEVICEINTERFACE:
			{
			//需要的操作
					
			}
			break;

		case DBT_DEVTYP_HANDLE:
			pDevHnd = (PDEV_BROADCAST_HANDLE)pHdr;
			break;

		case DBT_DEVTYP_OEM:
			pDevOem = (PDEV_BROADCAST_OEM)pHdr;
			break;

		case DBT_DEVTYP_PORT:
			pDevPort = (PDEV_BROADCAST_PORT)pHdr;
			break;

		case DBT_DEVTYP_VOLUME:
			pDevVolume = (PDEV_BROADCAST_VOLUME)pHdr;
			break;
		}
	}
	return 0;
}