Public Class Form1
Private Declare Function InternetOpen Lib "wininet.dll" Alias "InternetOpenA" (ByVal sAgent As String, ByVal lAccessType As Long, ByVal sProxyName As String, ByVal sProxyBypass As String, ByVal lFlags As Long) As Long
Private Declare Function InternetOpenUrl Lib "wininet.dll" Alias "InternetOpenUrlA" (ByVal hInternetSession As Long, ByVal sURL As String, ByVal sHeaders As String, ByVal lHeadersLength As Long, ByVal lFlags As Long, ByVal lContext As Long)
As Long
Private Declare Function InternetReadFile Lib "wininet.dll" (ByVal hFile As Long, ByVal sBuffer As String, ByVal lNumBytesToRead As Long, ByVal lNumberOfBytesRead As Long) As Integer
Private Declare Function InternetCloseHandle Lib "wininet.dll" (ByVal hInet As Long) As Integer
Private Const IF_FROM_CACHE = &H1000000
Private Const IF_MAKE_PERSISTENT = &H2000000
Private Const IF_NO_CACHE_WRITE = &H4000000
Private Const BUFFER_LEN = 256
Public Function GetUrlSource(ByVal sURL As String) As String
Dim sBuffer, sData As String
Dim BUFFER_LEN, iResult As Integer
Dim hInternet As Long, hSession As Long, lReturn As Long
hSession = InternetOpen("vb wininet", 1, vbNullString, vbNullString, 0)
If hSession Then hInternet = InternetOpenUrl(hSession, sURL, vbNullString, 0, IF_NO_CACHE_WRITE, 0)
If hInternet Then
iResult = InternetReadFile(hInternet, sBuffer, BUFFER_LEN, lReturn)
sData = sBuffer
Do While lReturn <> 0
iResult = InternetReadFile(hInternet, sBuffer, BUFFER_LEN, lReturn)
sData = sData + Mid(sBuffer, 1, lReturn)
Loop
End If
If InStr(1, sData, Chr(0)) Then sData = Mid(sData, 1, InStr(1, sData, Chr(0)) - 1)
iResult = InternetCloseHandle(hInternet)
GetUrlSource = sData
End Function
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
TextBox1.Text = GetUrlSource("http://www.baidu.com")
End Sub
End Class
大伙看看这段代码哪里不对，在VB6中可以，在VBnet中就不行了
