C# Definition:

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct WLAN_AVAILABLE_NETWORK
    {
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
        public string strProfileName;
        public DOT11_SSID dot11Ssid;
        public DOT11_BSS_TYPE dot11BssType;
        public uint uNumberOfBssids;
        public bool bNetworkConnectable;
        public uint wlanNotConnectableReason;
        public uint uNumberOfPhyTypes;
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
        public DOT11_PHY_TYPE[] dot11PhyTypes;
        public bool bMorePhyTypes;
        public uint wlanSignalQuality;
        public bool bSecurityEnabled;
        public DOT11_AUTH_ALGORITHM dot11DefaultAuthAlgorithm;
        public DOT11_CIPHER_ALGORITHM dot11DefaultCipherAlgorithm;
        public uint dwFlags;
        public uint dwReserved;
    }

VB Definition:

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)> _
    Public Structure WLAN_AVAILABLE_NETWORK
        <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=256)> _
        Public strProfileName As String
        Public dot11Ssid As DOT11_SSID
        Public dot11BssType As DOT11_BSS_TYPE
        Public uNumberOfBssids As UInteger
        Public bNetworkConnectable As Boolean
        Public wlanNotConnectableReason As UInteger
        Public uNumberOfPhyTypes As UInteger
        <MarshalAs(UnmanagedType.ByValArray, SizeConst:=8)> _
        Public dot11PhyTypes As DOT11_PHY_TYPE()
        Public bMorePhyTypes As Boolean
        Public wlanSignalQuality As UInteger
        Public bSecurityEnabled As Boolean
        Public dot11DefaultAuthAlgorithm As DOT11_AUTH_ALGORITHM
        Public dot11DefaultCipherAlgorithm As DOT11_CIPHER_ALGORITHM
        Public dwFlags As UInteger
        Public dwReserved As UInteger
    End Structure

User-Defined Field Types:

DOT11_SSID

DOT11_BSS_TYPE

DOT11_PHY_TYPE

DOT11_AUTH_ALGORITHM

DOT11_CIPHER_ALGORITHM

Notes:

None.