post 提交用户输入的方式是隐含提交，在ASP端用request.getform()来获取输入域的值;
get 提交用户输入的方式是显式提交，提交时在浏览器的地址栏里可以看见用户输入的内容(你在Google中输入Java搜索，你按查找后可以在地址栏里看到java)，在ASP端用request.getquery()来获取输入域的值;

SUMMARY
    To properly simulate a Form submission using WinInet, you need to send a header that indicates the proper Content-Type. For Forms, the proper Content-Type header is: Content-Type: application/x-www-form-urlencoded
    
    MORE INFORMATION
    In many cases, the server does not respond appropriately if a Content-Type is not specified. For example, the Active Server Pages component of IIS 3.0 actually checks this header specifically for ''application/x-www-form- urlencoded'' before adding form variables to the "Request.Form" object. This MIME/Content-Type indicates that the data of the request is a list of URL- encoded form variables. URL-encoding means that space character (ASCII 32) is encoded as ''+'', special character such ''!'' encoded in hexadecemal form as ''%21''.
    
    Here is a snippet of code that uses the MFC WinInet classes to simulate a Form POST request:
     CString strHeaders =
     _T("Content-Type: application/x-www-form-urlencoded");
     // URL-encoded form variables -
     // name = "John Doe", userid = "hithere", other = "P&Q"
     CString strFormData = _T("name=John+Doe&userid=hithere&other=P%26Q");
    
     CInternetSession session;
     CHttpConnection* pConnection =
     session.GetHttpConnection(_T("ServerNameHere"));
     CHttpFile* pFile =
     pConnection->OpenRequest(CHttpConnection::HTTP_VERB_POST,
     _T("FormActionHere"));
     BOOL result = pFile->SendRequest(strHeaders,
     (LPVOID)(LPCTSTR)strFormData, strFormData.GetLength());
    
    
    Without MFC, the same code translates to straight SDK calls as follows:
     static TCHAR hdrs =
     _T("Content-Type: application/x-www-form-urlencoded");
     static TCHAR frmdata =
     _T("name=John+Doe&userid=hithere&other=P%26Q");
     statuc TCHAR accept =
     _T("Accept: */*");
    
     // for clarity, error-checking has been removed
     HINTERNET hSession = InternetOpen("MyAgent",
     INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
     HINTERNET hConnect = InternetConnect(hSession, _T("ServerNameHere"),