devicechooser.cpp

这个是微软WINCE的OBEX协议例子

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this source code is subject to the terms of the Microsoft end-user
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
// If you did not accept the terms of the EULA, you are not authorized to use
// this source code. For a copy of the EULA, please see the LICENSE.RTF on your
// install media.
//
#include <windows.h>
#include "DeviceChooser.h"

#define _STRINGS_DEFINE_STRINGS
#include "ObexStrings.h"

#define MSG_OBEX_EVENT (WM_USER + 1001)


static BOOL fIsEnuming;

class CObexSink : public IObexSink
{
public:
    CObexSink(HWND hWnd) 
    { 
        _hWnd = hWnd;    
        _ulRefs = 0;
    }
    ~CObexSink() {}

public:
    HRESULT STDMETHODCALLTYPE Notify(OBEX_EVENT Event, IUnknown * pUnk1, IUnknown * pUnk2)
    {
        ASSERT(fIsEnuming);

        
        if ((IsWindow(_hWnd)) && (pUnk1))
        {            
            //since PostMessage returns quickly (w/o processing event) 
            //   AddRef it first            
            pUnk1->AddRef(); 
            PostMessage(_hWnd, MSG_OBEX_EVENT, (WPARAM )Event, (LPARAM )pUnk1);
        }
        return S_OK;
    }

    HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppv)
    {
        if ((riid == IID_IObexSink) || (riid == IID_IUnknown))
        {
            *ppv = (IConnectionPoint *) this;
        }
        else
        {
            *ppv = NULL;
            return E_NOINTERFACE;
        }
        AddRef();
        return S_OK;
    }

    ULONG   STDMETHODCALLTYPE AddRef() 
    { 
        return InterlockedIncrement((LONG*)&_ulRefs); 
    }

    ULONG   STDMETHODCALLTYPE Release()
    {
        ULONG ulRefs;
        InterlockedExchange((LONG *)&ulRefs, _ulRefs);
        if (InterlockedDecrement((LONG*)&_ulRefs) == 0)
        {
            delete this;
            return 0;
        }
        return ulRefs - 1;
    }

private:
    ULONG    _ulRefs;
    HWND    _hWnd;
};




struct DeviceList
{
    DeviceList *pNext;
    IPropertyBag *pBag;
};

typedef struct CHOOSEDEVICE_PARAM
{
    IObex        *pObex;
    IObexDevice **ppObexDevice;
	ULONG		  ulListenMask;
} CHOOSEDEVICE_PARAM;



CRITICAL_SECTION csLock;

UINT ChooseService(HINSTANCE hInst, HWND hwndParent, IObex *pObex, IObexDevice **ppObexDevice, ULONG ulListenMask)
{
    int ret;
    *ppObexDevice = NULL;
    
    CHOOSEDEVICE_PARAM cp;
    cp.pObex = pObex;
    cp.ppObexDevice = ppObexDevice;
	cp.ulListenMask = ulListenMask;
    InitializeCriticalSection(&csLock);

    ret =
        DialogBoxParam(hInst, 
        MAKEINTRESOURCE(IDD_CHOOSESERVICE),
        hwndParent, 
        (DLGPROC)ChooseServiceProc, 
        (LPARAM)&cp);

    DeleteCriticalSection(&csLock);
    
    if(ret && ppObexDevice)
        return ret;
    else
        return 1;
}


LRESULT CALLBACK ChooseServiceProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    static HWND hwndList; 
    static IObexDevice **ppObexDevice;
    
    static IObex *pObex = NULL;
    static IConnectionPointContainer *pCont = NULL;
    static IConnectionPoint *pConPt = NULL;
    static DWORD dwCookie;
    static DeviceList *pDeviceList = NULL;
	static ULONG ulListenMask = 0;
    
    

    switch(message)
    {
    case WM_INITDIALOG :
        EnterCriticalSection(&csLock);
        pDeviceList = NULL;
        pObex = ((CHOOSEDEVICE_PARAM *)lParam)->pObex;
		ulListenMask = ((CHOOSEDEVICE_PARAM *)lParam)->ulListenMask;
        pObex->AddRef();
        ppObexDevice = ((CHOOSEDEVICE_PARAM *)lParam)->ppObexDevice;

         //release the device (if it exists)
        if(*ppObexDevice)
            (*ppObexDevice)->Release();
        *ppObexDevice = 0;
        
        hwndList = GetDlgItem(hwnd, IDC_LIST);        

        CObexSink *pSink;
        pSink = new CObexSink(hwnd);
        if (!pSink)
        {
            LeaveCriticalSection(&csLock);
            break;
        }

        fIsEnuming = TRUE;
        if ( (pObex) && (pSink) && (SUCCEEDED(pObex->QueryInterface(IID_IConnectionPointContainer, (LPVOID *)&pCont))) &&
             (SUCCEEDED(pCont->FindConnectionPoint(IID_IObexSink, &pConPt))) && (pConPt) &&
             (SUCCEEDED(pConPt->Advise((IUnknown *)pSink, &dwCookie)))     )
        {
            
            pObex->StartDeviceEnum();
        }
        else
        {
            fIsEnuming = FALSE;
        }
        LeaveCriticalSection(&csLock);
        break;

    case WM_DESTROY:
        EnterCriticalSection(&csLock);


        //
        //  Disconnect ourselves as a sink
        if (pConPt)
        {
            pConPt->Unadvise(dwCookie);
            pConPt->Release();
        }

        if(fIsEnuming)
        {
            pObex->StopDeviceEnum();
            fIsEnuming = FALSE;
        }

        

        //
        //  Delete all devices that are lingering
        while(pDeviceList)
        {
            DeviceList *pDelMe = pDeviceList;    
            pDeviceList = pDeviceList->pNext;
            pDelMe->pBag->Release();        
            delete pDelMe;
        }
        
        if (pCont)
            pCont->Release();
        if (pObex)
            pObex->Release();
        LeaveCriticalSection(&csLock);
        break;

    case MSG_OBEX_EVENT:
    {
        EnterCriticalSection(&csLock);
        
        IPropertyBag *pDevice = NULL;
        if (NULL != (pDevice = (IPropertyBag *)lParam))
        {
            VARIANT varAddress;
            VARIANT varDeviceName;
            VARIANT varTransport;
            VARIANT varPort;
            VARIANT varUUID;
            
            BOOL fHaveAddress = FALSE;
            BOOL fHaveDeviceName = FALSE;
            BOOL fHaveTransport = FALSE;
            BOOL fHavePort = FALSE;
            BOOL fHaveUUID = FALSE;
            
            VariantInit(&varDeviceName);
            VariantInit(&varTransport);
            VariantInit(&varAddress);
            VariantInit(&varPort);
            VariantInit(&varUUID);

            if(SUCCEEDED(pDevice->Read(c_szDevicePropName, &varDeviceName, NULL)))
                fHaveDeviceName = TRUE;
            if(SUCCEEDED(pDevice->Read(c_szDevicePropTransport, &varTransport, NULL)))
                fHaveTransport = TRUE;
            if(SUCCEEDED(pDevice->Read(c_szDevicePropAddress, &varAddress, NULL)))
                fHaveAddress = TRUE;
            if(SUCCEEDED(pDevice->Read(c_szPort, &varPort, NULL)))
                fHavePort = TRUE;
            if(SUCCEEDED(pDevice->Read(c_szDeviceServiceUUID, &varUUID, NULL)))
                fHaveUUID = TRUE;


            //see how much we can read    
            if (wParam == OE_DEVICE_ARRIVAL)
            {
                CLSID clsidTrans;

                if( fHaveDeviceName && (varDeviceName.vt == VT_BSTR) &&