C# Definition:

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]
public struct IP_ADDRESS_STRING
{
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst=16)]
    public string Address;
}

VB Definition:

    <StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Ansi)> _
    Private Structure IP_ADDRESS_STRING
    <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=(4 * 4))> _
        Dim value As String
    End Structure

User-Defined Field Types:

None.

Notes:

None.