vb调用winInet API接口post数据到指定的url

vb调用winInet API接口post数据到指定的url(6)            Const HTTP_ADDREQ_FLAG_REPLACE = &H80000000
  sHeader = "Content-Type: application/x-www-form-urlencoded" _
             & vbCrLf
           bRet = HttpAddRequestHeaders(hHttpOpenRequest, _
             sHeader, Len(sHeader), HTTP_ADDREQ_FLAG_REPLACE _
             Or HTTP_ADDREQ_FLAG_ADD)
  
           Dim lpszPostData As String
           Dim lPostDataLen As Long
  
           lpszPostData = postdat$
           lPostDataLen = Len(lpszPostData)
           bRet = HttpSendRequest(hHttpOpenRequest, _
                  vbNullString, _
                  0, _
                  lpszPostData, _
                  lPostDataLen)
  
           Dim bDoLoop             As Boolean
           Dim sReadBuffer         As String * 2048
           Dim lNumberOfBytesRead  As Long