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Public Function IsValidIPAddress(ByVal strIPAddress As String) As Boolean
    On Error GoTo Handler
    Dim varAddress As Variant, n As Long, lCount As Long
    varAddress = Split(strIPAddress, ".", , vbTextCompare)
    If IsArray(varAddress) Then
        For n = LBound(varAddress) To UBound(varAddress)
            lCount = lCount + 1
            varAddress(n) = CByte(varAddress(n))
        Next
        IsValidIPAddress = (lCount = 4)
    Else
        IsValidIPAddress = False
    End If
Handler:
End Function


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Option Explicit
Private Type BROWSEINFO
hOwner As Long
pidlRoot As Long
pDisplayName As String
lpTitle As String
ulFlags As Long
lpfn As Long
lParam As Long
iImage As Long
End Type
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