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Managed Wifi - http://managedwifi.codeplex.com/

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[DllImport("Wlanapi.dll", SetLastError = true, CharSet = CharSet.Unicode)]

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     WLAN_HOSTED_NETWORK_OPCODE OpCode,

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        WLAN_INTF_OPCODE OpCode,

        IntPtr pWlanOpcodeValueType);

    <[In]> ByRef pInterfaceGuid As Guid, ByVal OpCode As WLAN_INTF_OPCODE, _

    ByRef ppData As IntPtr, ByVal pWlanOpcodeValueType As IntPtr) As UInteger

WLAN_INTF_OPCODE

There is a managed WiFi API available on codeplex http://managedwifi.codeplex.com/

Depending on the opcode, the data returned in the memory pointed to by ppData can be:

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            if (WlanQueryInterface(handle, ref guid, WLAN_INTF_OPCODE.wlan_intf_opcode_current_connection, IntPtr.Zero, out dataSize, ref ptr, IntPtr.Zero) != 0)

         If WlanQueryInterface(handle, guid, WLAN_INTF_OPCODE.wlan_intf_opcode_current_connection, IntPtr.Zero, dataSize, ptr, _

[DllImport("Wlanapi.dll",SetLastError = true,CharSet = CharSet.Unicode)]

public static extern uint WlanReasonCodeToString(uint dwReasonCode,uint dwBufferSize,string pStringBuffer,IntPtr pReserved);

Declare Function WlanReasonCodeToString Lib "wlanapi.dll" (TODO) As TODO

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uint pwdReasonCode=524289,dwBufferSize=64;

WlanReasonCodeToString(pwdReasonCode,dwBufferSize,pStringBuffer,new IntPtr());

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      uint resultCode = WlanScan(wlanHndl, ref g, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);

      if (resultCode != 0)

public static extern uint WlanSetInterface(IntPtr hClientHandle,ref Guid pInterfaceGuid,WLAN_INTF_OPCODE OpCode,uint dwDataSize,ref object obj ,IntPtr pReserved);

WLAN_INTF_OPCODE

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[DllImport("Wlanapi.dll",SetLastError = true,CharSet = CharSet.Unicode)]

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[DllImport("Wlanapi.dll",SetLastError = true,CharSet = CharSet.Unicode)]

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<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)> _

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Also, see the Managed wrapper class CsQuickUSB http://code.google.com/p/csquickusb/

QuickUsb.dll is not unicode friendly, make sure you use ANSI encodings on your pinvoke calls!

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    int resultCode = 0;            //Result of operation.

    int errorCode = 0;                //Resultant error.

                resultCode = bind(socketHandle, ref remoteAddress,

                errorCode = Marshal.GetLastWin32Error();

                returnValue = (resultCode == 0);

    [DllImport("ws2_32.dll", CharSet = CharSet.Unicode, SetLastError = true)]

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    public enum ControlCode : int

Declare Function ControlCode Lib "ws2_32.dll" (TODO) As TODO

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    [DllImport("Ws2_32.dll", CharSet = CharSet.Unicode, EntryPoint = "InetNtopW")]

    [DllImport("Ws2_32.dll", CharSet = CharSet.Unicode, EntryPoint = "InetNtopW")]

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    [DllImport("Ws2_32.dll", CharSet = CharSet.Unicode, EntryPoint = "InetPtonW")]

    [DllImport("Ws2_32.dll", CharSet = CharSet.Unicode, EntryPoint = "InetPtonW")]

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            this.socketPtr, Native.ControlCode.FIONREAD,

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