ttt xp mfcdlg.cpp

windows XP 上基于ＵＮＰＮ协议查找设备的源码

// ttt xp mfcDlg.cpp : 实现文件
//

#include "stdafx.h"
#include "ttt xp mfc.h"
#include "ttt xp mfcDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CtttxpmfcDlg 对话框




CtttxpmfcDlg::CtttxpmfcDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CtttxpmfcDlg::IDD, pParent)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CtttxpmfcDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CtttxpmfcDlg, CDialog)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
	ON_BN_CLICKED(IDC_BUTTON1, &CtttxpmfcDlg::OnBnClickedButton1)
END_MESSAGE_MAP()


// CtttxpmfcDlg 消息处理程序

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

	// 设置此对话框的图标。当应用程序主窗口不是对话框时，框架将自动
	//  执行此操作
	SetIcon(m_hIcon, TRUE);			// 设置大图标
	SetIcon(m_hIcon, FALSE);		// 设置小图标

	// TODO: 在此添加额外的初始化代码

	return TRUE;  // 除非将焦点设置到控件，否则返回 TRUE
}

// 如果向对话框添加最小化按钮，则需要下面的代码
//  来绘制该图标。对于使用文档/视图模型的 MFC 应用程序，
//  这将由框架自动完成。

void CtttxpmfcDlg::OnPaint()
{
	if (IsIconic())
	{
		CPaintDC dc(this); // 用于绘制的设备上下文

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// 使图标在工作矩形中居中
		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;

		// 绘制图标
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

//当用户拖动最小化窗口时系统调用此函数取得光标显示。
//
HCURSOR CtttxpmfcDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}


void CtttxpmfcDlg::OnBnClickedButton1()
{
	// TODO: 在此添加控件通知处理程序代码

		HRESULT         hr =S_OK;
  // List of interfaces needed
  IUPnPDeviceFinder *pDevFinder=NULL;
  IUPnPDevice *pDevice =NULL;
  IUPnPDeviceDocumentAccess* pDeviceDocument=NULL;
  BSTR bstrDeviceUDN =NULL;
  BSTR bstrDeviceDocumentURL = NULL; 

  bstrDeviceUDN = SysAllocString(L"uuid:00000000-0000-0000-0001-0000856EFA84");
  //CoInitialize the program so that we can create COM objects
  CoInitializeEx(NULL,COINIT_MULTITHREADED);

  //now try to instantiate the DeviceFinder object
  hr = CoCreateInstance(  CLSID_UPnPDeviceFinder, 
              NULL,
              CLSCTX_INPROC_SERVER,
              IID_IUPnPDeviceFinder,
              (LPVOID *) &pDevFinder); 
hr=S_FALSE;

  while(hr)
  {
	  hr=pDevFinder->FindByUDN(bstrDeviceUDN, &pDevice);
  };

  if(hr!=S_OK)
  {
    goto cleanup;
  }

  //Now query pDevice for IUPnPDeviceDocumentAccess
  hr = pDevice->QueryInterface(IID_IUPnPDeviceDocumentAccess, (VOID **)&pDeviceDocument);
  if(SUCCEEDED(hr))
  {
    // We have got a pointer to the IUPnPDeviceDocumentAccess interface.
    // GetDocumentURL is available only in Windows XP. 
    hr = pDeviceDocument->GetDocumentURL(&bstrDeviceDocumentURL);
	if(SUCCEEDED(hr))
	{

	}
  }   
cleanup:
  //release references to all interfaces 
  if(pDevFinder)
    pDevFinder->Release();
  if(pDevice)
    pDevice->Release();
  if(pDeviceDocument)
    pDeviceDocument->Release();
  
  // Free the bstr strings
  if(bstrDeviceDocumentURL)
    SysFreeString(bstrDeviceDocumentURL);
  if(bstrDeviceUDN)
    SysFreeString(bstrDeviceUDN);
  CoUninitialize();


}