Windows Mobile GPRS Connection via Proxy (Wap Gateway)

在Windows Mobile中，使用win32 api連接至internet，首先必須建立APN連線，再依下列步驟即可，最後送出一個query request，返回200則表示連線成功，網路上查得許多資料，卻都未能完成我所想要的結果，經過一番努力總算成功運用這些api，下面列出幾個關鍵點，在此記錄並分享。

1. APN connect

lResult = ConnMgrMapConRef(ConRefType_NAP,APN_Name, &guidNetwork);

CONNMGR_CONNECTIONINFO ConnInfo;
ConnInfo.dwFlags = CONNMGR_FLAG_PROXY_HTTP | CONNMGR_FLAG_PROXY_WAP | CONNMGR_FLAG_PROXY_SOCKS4 | CONNMGR_FLAG_PROXY_SOCKS5;
ConnInfo.xxx= xxxx... ;
HRESULT hResult = ConnMgrEstablishConnectionSync(&ConnInfo, &phConnection, 10*1000, &dwStatus );
if( FAILED(hResult))
             Add_Log(hWnd, _T("Connected failed!! Please retry your connection..."));
else{
             Add_Log(hWnd, _T("APN connected!!"));
             hResult = ConnMgrConnectionStatus(phConnection,&dwStatus);
             if (dwStatus == CONNMGR_STATUS_CONNECTED) {
                   Add_Log(hWnd, _T("Internet connection succesfully completed."));
             }
}

2. Set the internet open type:

hHttpOpen = InternetOpen( L"Test",
             INTERNET_OPEN_TYPE_PROXY, // use proxy tag 
             L"http://xx.xx.xx.xx:5408", // [proxy url]:[port]
             0,
             0 );

3. Open a HTTP session for a given site:

hHttpSession = InternetConnect( hHttpOpen,
            (LPCWSTR)L"mmm.mmm.mmm.mmm", // dest host, 如 www.mobile01.com
            5978, // dest port number
            NULL,
            NULL,
            INTERNET_SERVICE_HTTP,
            0,
            0 );

4. Creates an HTTP request handle:

hHttpRequest = HttpOpenRequest( hHttpSession,
             (LPCWSTR)L"GET",
             (LPCWSTR)L"/xxx/xxx/xxx.xxx",//target in host, 如 /index.php  
             HTTP_VERSION,
             NULL,
             NULL,
             INTERNET_FLAG_DONT_CACHE,
             0 );

5. Sends the specified request to the HTTP server:

if(!HttpSendRequest( hHttpRequest,NULL, 0, NULL, 0))
{
             Add_Log(hWnd, _T(" HttpSendRequest Failed! (%x)\n", GetLastError()));
             InternetCloseHandle(hHttpOpen);
             InternetCloseHandle(hHttpSession);
             InternetCloseHandle(hHttpRequest);
             return false;
}

6. Retrieves header information associated with an HTTP request:

HttpQueryInfo ( hHttpRequest,
             HTTP_QUERY_STATUS_CODE|HTTP_QUERY_FLAG_NUMBER,
             &dwStatus,
             &dwLengthSizeBuffer,
             NULL );
if (dwStatus == 404)
             Add_Log(hWnd,_T(" Connection Failed."));
else if (dwStatus == 200)
             Add_Log(hWnd,_T(" Succeed."));
else
             Add_Log(hWnd,_T(" Unknown Response."));

wchar_t   errorMsg[20]={0};
wsprintf(errorMsg, L"Response:: %u", dwStatus);
Add_Log(hWnd,errorMsg);

以下這個網站可幫我們將source code給highlight出來，挺方便的
http://tohtml.com/cpp/