September 19, 2009

Get Local IP Address

This will get the local IP address and Host name of the local machine that you are using.



Make a command button
2 text boxes

-code start here-


Private Sub Command1_Click()
Text1 = GetIPHostName()
Text2 = GetIPAddress()
End Sub


'**************************************
'Windows API/Global Declarations for :Ge
' t Local IP Address
'**************************************
Option Explicit
Public Const MAX_WSADescription = 256
Public Const MAX_WSASYSStatus = 128
Public Const ERROR_SUCCESSAs Long = 0
Public Const WS_VERSION_REQD As Long = &H101
Public Const WS_VERSION_MAJORAs Long = WS_VERSION_REQD \ &H100 And &HFF&
Public Const WS_VERSION_MINORAs Long = WS_VERSION_REQD And &HFF&
Public Const MIN_SOCKETS_REQDAs Long = 1
Public Const SOCKET_ERRORAs Long = -1

Public Type HOSTENT
hName As Long
hAliasesAs Long
hAddrType As Integer
hLenAs Integer
hAddrList As Long
End Type

Public Type WSADATA
wVersion As Integer
wHighVersion As Integer
szDescription(0 To MAX_WSADescription)As Byte
szSystemStatus(0 To MAX_WSASYSStatus)As Byte
wMaxSocketsAs Integer
wMaxUDPDG As Integer
dwVendorInfo As Long
End Type

Public Declare Function WSAGetLastError Lib "WSOCK32.DLL" () As Long

Public Declare Function WSAStartup Lib "WSOCK32.DLL" _
(ByVal wVersionRequired As Long, lpWSADATA As WSADATA) As Long

Public Declare Function WSACleanup Lib "WSOCK32.DLL" () As Long

Public Declare Function gethostname Lib "WSOCK32.DLL" _
(ByVal szHost As String, ByVal dwHostLen As Long) As Long

Public Declare Function gethostbyname Lib "WSOCK32.DLL" _
(ByVal szHost As String) As Long

Public Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" _
(hpvDest As Any, ByVal hpvSource As Long, ByVal cbCopy As Long)

Public Function GetIPAddress() As String

Dim sHostNameAs String * 256
Dim lpHostAs 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
GetIPAddress = ""
Exit Function
End If

If gethostname(sHostName, 256) = SOCKET_ERROR Then
GetIPAddress = ""
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
GetIPAddress = ""
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

GetIPAddress = Mid$(sIPAddr, 1, Len(sIPAddr) - 1)
SocketsCleanup
End Function

Public Function GetIPHostName() As String

Dim sHostName As String * 256

If Not SocketsInitialize() Then
GetIPHostName = ""
Exit Function
End If

If gethostname(sHostName, 256) = SOCKET_ERROR Then
GetIPHostName = ""
MsgBox "Windows Sockets Error " & Str$(WSAGetLastError()) & _
" has occurred. Unable To successfully Get Host Name."
SocketsCleanup
Exit Function
End If

GetIPHostName = Left$(sHostName, InStr(sHostName, Chr(0)) - 1)
SocketsCleanup
End Function

Public Function HiByte(ByVal wParam As Integer)

HiByte = wParam \ &H100 And &HFF&

End Function

Public Function LoByte(ByVal wParam As Integer)

LoByte = wParam And &HFF&
End Function

Public Sub SocketsCleanup()

If WSACleanup() <> ERROR_SUCCESS Then
MsgBox "Socket Error occurred In Cleanup."
End If

End Sub

Public 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

-code end here-

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