#include <afxinet.h>//GB2312 轉(zhuǎn)換成 Unicode wchar_t* GB2312ToUnicode(const char* szGBString) {UINT nCodePage = 936; //GB2312int nLength=MultiByteToWideChar(nCodePage,0,szGBString,-1,NULL,0);wchar_t* pBuffer = new wchar_t[nLength+1];MultiByteToWideChar(nCodePage,0,szGBString,-1,pBuffer,nLength);pBuffer[nLength]=0;return pBuffer; }CString CNetDlg::GetNetIp() {CString internetIp = _T("");char chSource[4096] = {0};CString strAddress;CInternetSession mySession(NULL,0);CHttpFile* myHttpFile=NULL;strAddress = _T("http://20140507.ip138.com/ic.asp");//ip138網(wǎng)頁(yè)TRY{myHttpFile = (CHttpFile*)mySession.OpenURL(strAddress);//讀取網(wǎng)絡(luò)地址while(myHttpFile->Read(chSource, 4096)){//循環(huán)讀取下載來(lái)的網(wǎng)頁(yè)文本int begin = 0;// 目前只處理字符集為gb2312的情況begin = CKMP<BYTE*>::Find((BYTE*)chSource, strlen(chSource), (BYTE*)_C("charset=gb2312"), 14);if (begin != -1){WCHAR* wchSource = GB2312ToUnicode(chSource);internetIp = wchSource;delete[] wchSource;}begin = internetIp.Find(_T("["), 0);if(begin !=- 1)//如果找到"["， 則找"]"? 中括號(hào)內(nèi)的文本則是 你的外網(wǎng)ip{ int end=internetIp.Find(_T("]"));internetIp = internetIp.Mid(begin+1, end-begin-1);//提取外網(wǎng)ipbreak;}}myHttpFile->Close();mySession.Close();}CATCH(CInternetException,e){internetIp.Format(T_T(_$_STRING_FORMAT_1), e->m_dwError, e->m_dwContext);}CATCH_ALL(e){TCHAR ch[MAX_PATH] = {0};e->GetErrorMessage(ch, MAX_PATH);internetIp.Format(T_T(_$_STRING_FORMAT_1), -3, ch);}END_CATCH_ALLTRACE(internetIp);return internetIp; }

參考：

http://blog.csdn.net/cbk861110/article/details/7844729

網(wǎng)頁(yè)地址

http://20140507.ip138.com/ic.asp

從

http://www.ip138.com

的網(wǎng)頁(yè)源碼中查找到。

<tr><td align="center"><h3>www.ip138.com IP查詢(xún)(搜索IP地址的地理位置)</h3></td></tr><tr><td height="30" align="center" valign="top"><iframe src="http://20140507.ip138.com/ic.asp" rel="nofollow" frameborder="0" scrolling="no" width="100%" height="100%"></iframe></td></tr>

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