Option Explicit
Private Const MAX_WSADescription = 256
Private Const MAX_WSASYSStatus = 128
Private Const ERROR_SUCCESS As Long = 0
Private Const WS_VERSION_REQD As Long = &H101
Private Const WS_VERSION_MAJOR As Long = WS_VERSION_REQD  &H100 And &HFF&
Private Const WS_VERSION_MINOR As Long = WS_VERSION_REQD And &HFF&
Private Const MIN_SOCKETS_REQD As Long = 1
Private Const SOCKET_ERROR As Long = -1
Private Type HOSTENT
    hName As Long
    hAliases As Long
    hAddrType As Integer
    hLen As Integer
    hAddrList As Long
    End Type
Private Type WSADATA
    wVersion As Integer
    wHighVersion As Integer
    szDescription(0 To MAX_WSADescription) As Byte
    szSystemStatus(0 To MAX_WSASYSStatus) As Byte
    wMaxSockets As Integer
    wMaxUDPDG As Integer
    dwVendorInfo As Long
    End Type
Private Declare Function WSAGetLastError Lib "WSOCK32.DLL" () As Long
Private Declare Function WSAStartup Lib "WSOCK32.DLL" _
    (ByVal wVersionRequired As Long, lpWSADATA As WSADATA) As Long
Private Declare Function WSACleanup Lib "WSOCK32.DLL" () As Long
Private Declare Function GetHostName Lib "WSOCK32.DLL" _
    Alias "gethostname" (ByVal szHost As String, ByVal dwHostLen As Long) As Long
Private Declare Function gethostbyname Lib "WSOCK32.DLL" _
    (ByVal szHost As String) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" _
    (hpvDest As Any, ByVal hpvSource As Long, ByVal cbCopy As Long)
Public Function GetLocalHost() As String
    Dim sHostName As String * 256
    If Not SocketsInitialize() Then
        GetLocalHost = ""
        Exit Function
    End If
    If GetHostName(sHostName, 256) = SOCKET_ERROR Then
        GetLocalHost = ""
''        MsgBox "Windows Sockets Error " & str$(WSAGetLastError()) & _
''        " has occurred. Unable To successfully Get Host Name."
        SocketsCleanup
        Exit Function
    End If
    GetLocalHost = Left$(sHostName, InStr(sHostName, Chr(0)) - 1)
    SocketsCleanup
End Function

Public Function GetLocalIP() As String
    Dim sHostName As String * 256
    Dim lpHost As Long
    Dim HOST As HOSTENT
    Dim dwIPAddr As Long
    Dim tmpIPAddr() As Byte
    Dim i As Integer
    Dim sIPAddr As String
    If Not SocketsInitialize() Then
        GetLocalIP = ""
        Exit Function
    End If
    If GetHostName(sHostName, 256) = SOCKET_ERROR Then
        GetLocalIP = ""
''        MsgBox "Windows Sockets Error " & Str$(WSAGetLastError()) & _
''        " has occurred. Unable To successfully Get Host Name."
        SocketsCleanup
        Exit Function
    End If
    sHostName = Trim$(sHostName)
    lpHost = gethostbyname(sHostName)
    If lpHost = 0 Then
        GetLocalIP = ""
''        MsgBox "Windows Sockets are Not responding. " & _
''        "Unable To successfully Get Host Name."
        SocketsCleanup
        Exit Function
    End If
    CopyMemory HOST, lpHost, Len(HOST)
    CopyMemory dwIPAddr, HOST.hAddrList, 4
    ReDim tmpIPAddr(1 To HOST.hLen)
    CopyMemory tmpIPAddr(1), dwIPAddr, HOST.hLen
    For i = 1 To HOST.hLen
        sIPAddr = sIPAddr & tmpIPAddr(i) & "."
    Next
    GetLocalIP = Mid$(sIPAddr, 1, Len(sIPAddr) - 1)
    SocketsCleanup
End Function
Private Function HiByte(ByVal wParam As Integer)
    HiByte = wParam  &H100 And &HFF&
   
End Function
Private Function LoByte(ByVal wParam As Integer)
    LoByte = wParam And &HFF&
End Function
Private Sub SocketsCleanup()
    If WSACleanup() <> ERROR_SUCCESS Then
        MsgBox "Socket Error occurred In Cleanup."
    End If
End Sub
Private Function SocketsInitialize() As Boolean
    Dim WSAD As WSADATA
    Dim sLoByte As String
    Dim sHiByte As String
    If WSAStartup(WS_VERSION_REQD, WSAD) <> ERROR_SUCCESS Then
        MsgBox "The 32-bit Windows Socket is Not responding."
        SocketsInitialize = False
        Exit Function
    End If
    If WSAD.wMaxSockets < MIN_SOCKETS_REQD Then
        MsgBox "This application requires a minimum of " & _
        CStr(MIN_SOCKETS_REQD) & " supported sockets."
        SocketsInitialize = False
        Exit Function
    End If
    If LoByte(WSAD.wVersion) < WS_VERSION_MAJOR Or _
    (LoByte(WSAD.wVersion) = WS_VERSION_MAJOR And _
    HiByte(WSAD.wVersion) < WS_VERSION_MINOR) Then
   
    sHiByte = CStr(HiByte(WSAD.wVersion))
    sLoByte = CStr(LoByte(WSAD.wVersion))
   
    MsgBox "Sockets version " & sLoByte & "." & sHiByte & _
    " is Not supported by 32-bit Windows Sockets."
   
    SocketsInitialize = False
    Exit Function
   
End If
SocketsInitialize = True
End Function