Const SOCKET_ERROR =  0 
Private Type WSAdata
    wVersion As Integer
    wHighVersion As Integer
    szDescription( 0  To  255 ) As Byte
    szSystemStatus( 0  To  128 ) As Byte
    iMaxSockets As Integer
    iMaxUdpDg As Integer
    lpVendorInfo As Long
End Type
Private Type Hostent
    h_name As Long
    h_aliases As Long
    h_addrtype As Integer
    h_length As Integer
    h_addr_list As Long
End Type
Private Type IP_OPTION_INFORMATION
    TTL As Byte
    Tos As Byte
    Flags As Byte
    OptionsSize As Long
    OptionsData As String *  128 
End Type
Private Type IP_ECHO_REPLY
    Address( 0  To  3 ) As Byte
    Status As Long
    RoundTripTime As Long
    DataSize As Integer
    Reserved As Integer
    data As Long
    Options As IP_OPTION_INFORMATION
End Type
Private Declare Function GetHostByName Lib "wsock32.dll" Alias "gethostbyname" (ByVal HostName As String) As Long
Private Declare Function WSAStartup Lib "wsock32.dll" (ByVal wVersionRequired&, lpWSAdata As WSAdata) As Long
Private Declare Function WSACleanup Lib "wsock32.dll" () As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long)
Private Declare Function IcmpCreateFile Lib "icmp.dll" () As Long
Private Declare Function IcmpCloseHandle Lib "icmp.dll" (ByVal HANDLE As Long) As Boolean
Private Declare Function IcmpSendEcho Lib "ICMP" (ByVal IcmpHandle As Long, ByVal DestAddress As Long, ByVal RequestData As String, ByVal RequestSize As Integer, RequestOptns As IP_OPTION_INFORMATION, ReplyBuffer As IP_ECHO_REPLY, ByVal ReplySize As Long, ByVal TimeOut As Long) As Boolean
Private Sub Form_Load()
Dim HostName As String
Const HostName1 = "192.168.9."
    Dim hFile As Long, lpWSAdata As WSAdata
    Dim hHostent As Hostent, AddrList As Long
    Dim Address As Long, rIP As String
    Dim OptInfo As IP_OPTION_INFORMATION
    Dim EchoReply As IP_ECHO_REPLY
    Call WSAStartup(&H101, lpWSAdata)
MsgBox Time$
For i =  1  To  254 
   HostName = HostName1 & i
    If GetHostByName(HostName + String( 64  - Len(HostName),  0 )) <> SOCKET_ERROR Then
        CopyMemory hHostent.h_name, ByVal GetHostByName(HostName + String( 64  - Len(HostName),  0 )), Len(hHostent)
        CopyMemory AddrList, ByVal hHostent.h_addr_list,  4 
        CopyMemory Address, ByVal AddrList,  4 
    End If
    hFile = IcmpCreateFile()
    OptInfo.TTL =  255 
    If IcmpSendEcho(hFile, Address, String( 32 , "A"),  32 , OptInfo, EchoReply, Len(EchoReply) +  8 ,  1 ) Then
        'rIP = CStr(EchoReply.Address(0)) + "." + CStr(EchoReply.Address(1)) + "." + CStr(EchoReply.Address(2)) + "." + CStr(EchoReply.Address(3))
        Cnt = Cnt +  1  'считаем машины
    End If
    Call IcmpCloseHandle(hFile)
Next
    Call WSACleanup
MsgBox Cnt & " " & Time$
End Sub

For i =  1  To  254 
    If IcmpSendEcho(hFile, Address, "A",  1 , OptInfo, EchoReply, Len(EchoReply) +  8 ,  1 ) Then
        Cnt = Cnt +  1 
    End If    
Next