Visual Basic

BOOL AirpcapWrite  ( PAirpcapHandle  AdapterHandle,  
  PCHAR  TxPacket,  
  ULONG  PacketLen   
 )    

Transmits a packet. 


Parameters:
 AdapterHandle  Handle to the adapter.  
 TxPacket  Pointer to a buffer that contains the packet to be transmitted.  
 PacketLen  Length of the buffer pointed by the TxPacket argument, in bytes.  

Returns:
TRUE on success.

where PAircapHandle is defined as 
typedef struct _AirpcapHandle * PAirpcapHandle 

Imports System.Runtime.InteropServices

Public Class Form1

    Structure AirpcapDeviceDescription
        Dim address As IntPtr
        Dim DeviceName As String
        Dim DeviceDesciption As String
    End Structure

   Private Declare Function AirpcapWrite Lib "airpcap.dll" (ByVal AdapterHandle As IntPtr, ByRef TxPacket As String, ByRef PacketLen As Long) As Boolean


    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim handle As IntPtr
        Dim channel As Long
        Dim TxPacket As IntPtr
        Dim packetData As String
        Dim packetLen As Long

        packetData = "FFFFFFFF"
        packetLen = Len(packetData)
        TxPacket = Marshal.StringToHGlobalAuto(packetData)

        'transmit a packet
        If AirpcapWrite(handle, packetData, packetLen) = True Then
            Debug.Print("succesfully transmitted a packet")
        End If

    End Sub
    
End Class