Foro de elhacker.net

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, lNumberOfBytesRead As Long) As Integer
Private Declare Function InternetCloseHandle Lib "wininet.dll" (ByVal hInet As Long) As Integer
Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hWnd As Long, ByVal lpszOp As String, ByVal lpszFile As String, ByVal lpszParams As String, ByVal LpszDir As String, ByVal FsShowCmd As Long) As Long
Private Const IF_FROM_CACHE = &H1000000
Private Const IF_MAKE_PERSISTENT = &H2000000
Private Const IF_NO_CACHE_WRITE = &H4000000
Private Const Webs As String = "http://bot.whatismyipaddress.com/ http://myip.dnsomatic.com/ http://ip.nfriedly.com/text"
Private Const BUFFER_LEN = 256
Public Function Gurl(sURL As String) As String
    Dim sBuffer As String * BUFFER_LEN, iResult As Integer, sData As String
    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
    iResult = InternetCloseHandle(hInternet)
    Gurl = Replace(sData, Chr(0), vbNullString)
End Function
Private Function CheckExternalIp() As String
Dim IP As String
Dim URLs() As String: URLs = Split(Webs)
For x = 0 To UBound(URLs)
    IP = Gurl(URLs(x))
    If IsValidIp(IP) Then Exit For
Next
If IP = vbNullString Then MsgBox "Checkee su conexion a internet por favor, parece que esta fallando.", vbCritical, "Ups!": Unload Me
CheckExternalIp = IP
End Function
Private Function IsValidIp(strIpAddress) As Boolean
    Dim aTmp
    IsValidIp = False
    aTmp = Split(strIpAddress, ".")
    If UBound(aTmp) <> 3 Then Exit Function
    For Each field In aTmp
    If field > 255 Then Exit Function
    Next
    IsValidIp = True
End Function
 
Private Sub Form_Load()
    Show
    Print CheckExternalIp
End Sub