'Place a Listbox, a command button, and a text box on your form.
'Call the command button cmdPing and the textbox txtPing
Private Const IP_STATUS_BASE = 11000
Private Const IP_SUCCESS = 0
Private Const IP_BUF_TOO_SMALL = (11000 + 1)
Private Const IP_DEST_NET_UNREACHABLE = (11000 + 2)
Private Const IP_DEST_HOST_UNREACHABLE = (11000 + 3)
Private Const IP_DEST_PROT_UNREACHABLE = (11000 + 4)
Private Const IP_DEST_PORT_UNREACHABLE = (11000 + 5)
Private Const IP_NO_RESOURCES = (11000 + 6)
Private Const IP_BAD_OPTION = (11000 + 7)
Private Const IP_HW_ERROR = (11000 + 8)
Private Const IP_PACKET_TOO_BIG = (11000 + 9)
Private Const IP_REQ_TIMED_OUT = (11000 + 10)
Private Const IP_BAD_REQ = (11000 + 11)
Private Const IP_BAD_ROUTE = (11000 + 12)
Private Const IP_TTL_EXPIRED_TRANSIT = (11000 + 13)
Private Const IP_TTL_EXPIRED_REASSEM = (11000 + 14)
Private Const IP_PARAM_PROBLEM = (11000 + 15)
Private Const IP_SOURCE_QUENCH = (11000 + 16)
Private Const IP_OPTION_TOO_BIG = (11000 + 17)
Private Const IP_BAD_DESTINATION = (11000 + 18)
Private Const IP_ADDR_DELETED = (11000 + 19)
Private Const IP_SPEC_MTU_CHANGE = (11000 + 20)
Private Const IP_MTU_CHANGE = (11000 + 21)
Private Const IP_UNLOAD = (11000 + 22)
Private Const IP_ADDR_ADDED = (11000 + 23)
Private Const IP_GENERAL_FAILURE = (11000 + 50)
Private Const MAX_IP_STATUS = 11000 + 50
Private Const IP_PENDING = (11000 + 255)
Private Const PING_TIMEOUT = 200
Private Const WS_VERSION_REQD = &H101
Private Const WS_VERSION_MAJOR = WS_VERSION_REQD \ &H100 And &HFF&
Private Const WS_VERSION_MINOR = WS_VERSION_REQD And &HFF&
Private Const MIN_SOCKETS_REQD = 1
Private Const SOCKET_ERROR = -1
Private Const MAX_WSADescription = 256
Private Const MAX_WSASYSStatus = 128
Private Type ICMP_OPTIONS
Ttl As Byte
Tos As Byte
Flags As Byte
OptionsSize As Byte
OptionsData As Long
End Type
Dim ICMPOPT As ICMP_OPTIONS
Private Type ICMP_ECHO_REPLY
Address As Long
status As Long
RoundTripTime As Long
DataSize As Integer
Reserved As Integer
DataPointer As Long
Options As ICMP_OPTIONS
Data As String * 250
End Type
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 IcmpCreateFile Lib "icmp.dll" () As Long
Private Declare Function IcmpCloseHandle Lib "icmp.dll" _
(ByVal IcmpHandle As Long) As Long
Private Declare Function IcmpSendEcho Lib "icmp.dll" _
(ByVal IcmpHandle As Long, _
ByVal DestinationAddress As Long, _
ByVal RequestData As String, _
ByVal RequestSize As Integer, _
ByVal RequestOptions As Long, _
ReplyBuffer As ICMP_ECHO_REPLY, _
ByVal ReplySize As Long, _
ByVal Timeout As Long) As Long
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" _
(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 RtlMoveMemory Lib "kernel32" _
(hpvDest As Any, _
ByVal hpvSource As Long, _
ByVal cbCopy As Long)
Private Function AddressStringToLong(ByVal tmp As String) As Long
Dim i As Integer
Dim parts(1 To 4) As String
i = 0
While InStr(tmp, ".") > 0
i = i + 1
parts(i) = Mid(tmp, 1, InStr(tmp, ".") - 1)
tmp = Mid(tmp, InStr(tmp, ".") + 1)
Wend
i = i + 1
parts(i) = tmp
If i <> 4 Then
AddressStringToLong = 0
Exit Function
End If
AddressStringToLong = Val("&H" & Right("00" & Hex(parts(4)), 2) & _
Right("00" & Hex(parts(3)), 2) & _
Right("00" & Hex(parts(2)), 2) & _
Right("00" & Hex(parts(1)), 2))
End Function
Private Function GetStatusCode(status As Long) As String
Dim msg As String
Select Case status
Case IP_SUCCESS: msg = txtPing.Text & " is replying"
Case IP_BUF_TOO_SMALL: msg = "IP buf too_small"
Case IP_DEST_NET_UNREACHABLE: msg = "IP dest net unreachable"
Case IP_DEST_HOST_UNREACHABLE: msg = "IP dest host unreachable"
Case IP_DEST_PROT_UNREACHABLE: msg = "IP dest prot unreachable"
Case IP_DEST_PORT_UNREACHABLE: msg = "IP dest port unreachable"
Case IP_NO_RESOURCES: msg = "IP no resources"
Case IP_BAD_OPTION: msg = "IP bad option"
Case IP_HW_ERROR: msg = "IP hw_error"
Case IP_PACKET_TOO_BIG: msg = "IP packet too_big"
Case IP_REQ_TIMED_OUT: msg = "IP req timed out"
Case IP_BAD_REQ: msg = "IP bad req"
Case IP_BAD_ROUTE: msg = "IP bad route"
Case IP_TTL_EXPIRED_TRANSIT: msg = "IP ttl expired transit"
Case IP_TTL_EXPIRED_REASSEM: msg = "IP ttl expired reassem"
Case IP_PARAM_PROBLEM: msg = "IP param_problem"
Case IP_SOURCE_QUENCH: msg = "IP source quench"
Case IP_OPTION_TOO_BIG: msg = "IP option too_big"
Case IP_BAD_DESTINATION: msg = "IP bad destination"
Case IP_ADDR_DELETED: msg = "IP addr deleted"
Case IP_SPEC_MTU_CHANGE: msg = "IP spec mtu change"
Case IP_MTU_CHANGE: msg = "IP mtu_change"
Case IP_UNLOAD: msg = "IP unload"
Case IP_ADDR_ADDED: msg = "IP addr added"
Case IP_GENERAL_FAILURE: msg = "IP general failure"
Case IP_PENDING: msg = "IP pending"
Case PING_TIMEOUT: msg = "ping timeout"
Case Else: msg = "unknown msg returned"
End Select
GetStatusCode = CStr(status) & " [ " & msg & " ]"
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 Function Ping(szAddress As String, ECHO As ICMP_ECHO_REPLY) As Long
Dim hPort As Long
Dim dwAddress As Long
Dim sDataToSend As String
Dim iOpt As Long
sDataToSend = "Echo This"
dwAddress = AddressStringToLong(szAddress)
Call SocketsInitialize
hPort = IcmpCreateFile()
If IcmpSendEcho(hPort, _
dwAddress, _
sDataToSend, _
Len(sDataToSend), _
0, _
ECHO, _
Len(ECHO), _
PING_TIMEOUT) Then
Ping = ECHO.RoundTripTime
Else
Ping = ECHO.status * -1
End If
Call IcmpCloseHandle(hPort)
Call SocketsCleanup
End Function
Private Function SocketsCleanup() As Boolean
Dim X As Long
X = WSACleanup()
If X <> 0 Then
MsgBox "Windows Sockets error " & Trim$(Str$(X)) & _
" occurred in Cleanup.", vbExclamation
SocketsCleanup = False
Else
SocketsCleanup = True
End If
End Function
Private Function SocketsInitialize() As Boolean
Dim WSAD As WSADATA
Dim X As Integer
Dim szLoByte As String, szHiByte As String, szBuf As String
X = WSAStartup(WS_VERSION_REQD, WSAD)
If X <> 0 Then
MsgBox "Windows Sockets for 32 bit Windows " & _
"environments is not successfully responding."
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
szHiByte = Trim$(Str$(HiByte(WSAD.wVersion)))
szLoByte = Trim$(Str$(LoByte(WSAD.wVersion)))
szBuf = "Windows Sockets Version " & szLoByte & "." & szHiByte
szBuf = szBuf & " is not supported by Windows " & _
"Sockets for 32 bit Windows environments."
MsgBox szBuf, vbExclamation
SocketsInitialize = False
Exit Function
End If
If WSAD.wMaxSockets < MIN_SOCKETS_REQD Then
szBuf = "This application requires a minimum of " & _
Trim$(Str$(MIN_SOCKETS_REQD)) & " supported sockets."
MsgBox szBuf, vbExclamation
SocketsInitialize = False
Exit Function
End If
SocketsInitialize = True
End Function
Private Sub cmdPing_Click()
Dim ECHO As ICMP_ECHO_REPLY
Dim pos As Integer
Dim i As Integer
Call Ping(txtPing.Text, ECHO)
For i = 1 To 3
List1.AddItem GetStatusCode(ECHO.status)
Next
List1.AddItem ECHO.Address
List1.AddItem "Time: " & ECHO.RoundTripTime & " ms"
List1.AddItem ECHO.DataSize & " bytes"
If Left$(ECHO.Data, 1) <> Chr$(0) Then
pos = InStr(ECHO.Data, Chr$(0))
List1.AddItem Left$(ECHO.Data, pos - 1)
End If
List1.AddItem ECHO.DataPointer
End Sub
