short recv_buff_unavail;

    short xmit_buf_unavail;

   Dim recv_buff_unavail As Short

   Dim xmit_buf_unavail As Short

   WORD    recv_buff_unavail;

   WORD    xmit_buf_unavail;

        internal AI ai_flags;

        internal ADDRESS_FAMILIES_INT ai_family;

        internal SOCKET_TYPE_INT ai_socktype;

        internal PROTOCOL_INT ai_protocol;

        internal uint ai_addrlen;

        //internal IntPtr ai_canonname;

        internal char* ai_canonname;

        //internal IntPtr ai_addr;

        internal sockaddr_UNSAFE* ai_addr;

        //internal IntPtr ai_next;

        internal addrinfo* ai_next;

            if ((IntPtr) ai_next == IntPtr.Zero)

            var info = ai_next;

            if ((IntPtr) (info->ai_next) == IntPtr.Zero)

            info = info->ai_next;

        get { return new string(ai_canonname); }

            (IntPtr) ai_addr,

            (IntPtr) ai_addr,

                   ai_flags = AI.AI_NOTHING,

                   ai_family = ADDRESS_FAMILIES_INT.AF_UNSPEC,

                   ai_socktype = SOCKET_TYPE_INT.SOCK_STREAM,

                   ai_protocol = PROTOCOL_INT.IPPROTO_IP

AI

internal enum AI : int

    AI_PASSIVE = 0x01,

    /// The canonical name is returned in the first ai_canonname member.

    AI_CANONNAME = 0x02,

    AI_NUMERICHOST = 0x04,

    AI_ADDRCONFIG = 0x0400,

    /// The address information can be from a non-authoritative namespace provider. This option is only supported on Windows Vista or later for the NS_EMAIL namespace.

    AI_NON_AUTHORITATIVE = 0x04000,

    /// The address information is from a secure channel. This option is only supported on Windows Vista or later for the NS_EMAIL namespace.

    AI_SECURE = 0x08000,

    /// The address information is for a preferred name for a user. This option is only supported on Windows Vista or later for the NS_EMAIL namespace.

    AI_RETURN_PREFERRED_NAMES = 0x010000,

    AI_FILESERVER = 0x00040000

Structure AI

The BITMAPINFOHEADER contains information about the color space and dimensions of a DIB.

   Public Shared Sub Main()

   End Sub 'Main

struct BP_PAINTPARAMS : IDisposable

    public BP_PAINTPARAMS(BPPF flags)

      cbSize = Marshal.SizeOf(typeof(BufferedPaintParams));

Structure BP_PAINTPARAMS

    /// The CAPTUREPARMS structure contains parameters that control the streaming video capture process.

        /// if memory is unavailable.

        ''' if memory is unavailable.

/// Contains extended result information obtained by calling the ChangeWindowMessageFilterEx function

     /// If the function succeeds, this field contains a value from the ExtStatusEnum.

    /// An array of offsets, relative to the beginning of this structure. The array contains

    /// cidl+1 elements. The first element of aoffset contains an offset to the fully-qualified

    /// Each of the remaining elements of the array contains an offset to one of the PIDLs to be

Actually, there's no COLORREF structure in native Win32. It is typedef-ed to DWORD, which means that in the managed world its direct counterpart is [System.Int32] (aka int in C#). So, when faced with interop involving COLORREF'S you'd better treat them as int's. Also have in mind that the color components are stored in reverse order, i.e. the Red component is in the lowest-byte. In short, the format is 0x00BBGGRR. You can use a code similar to the following to obtain a COLORREF:

->If there are no bytes in the input buffer, ReadFile waits until a byte arrives and then returns immediately.

   public IntPtr dwData;    // Any value the sender chooses.  Perhaps its main window handle?

// The first field, dwData, may contain anything the sender wishes; it is the equivalent of System.Object sender in an EventHandler.

// An example of sending a message containing a txStruct.

// containing a geocoordinate rectangle

     /// locally than it does remotely. This is useful in inter-domain scenarios where there is

    Public pwszContainerName As String

°¬K)x€¹¾¥Ç«‚KŸèÎæH¼ÈtY °ÎŠÊ!¯®cÄ)Ƴƒó~þñfÍM’î J…as†êKwˆ‘'HŠ‚2ŠÕèš7ˆ²“@ˆ¸7žS¬I$Võm¼u][JÿvÇ´^{uwU[}vñ˂B™c!LjÚiý8¹ ýD~|rفÎ%¿"gY²âºØ͓/‘9¦ÌÑPkò¿:URŅ+ßáUZ7Àەn p³Œ8´Í„Áa0¼žD[Sba;½;k« =w¬Õ.‰¥A‹Ã÷=0¹¹EHv5Ėè£ôÔTŸâÑMUœ&‚@Œ±Joáó f/®—d DŒ=5ø"{I–cmvba[(qK‹™aIÓõ‡ñ†,ò‹"]ÚìNž¤e÷ÉSªã9•|&ΟTĒ=ïmÐ×ÙWØyÅFÓ«áã%AÉwÿòëû° ¥ä2I0lfëjÌò.'BŽ•ÜLO Ê˜Ò/%¢—‰A²‡0ët&á½}N&¼³BtA¼

șiE ¡AQ+úÓ0FœƒFúžÉ;(øì ç#•êÞ]BͺŸ9n‡Kò…@r„ôçÖÿëÏ@n‚®gºN?3²ó T™$ySž‚Z//Ai€â¸sõ«Ñ7!÷

ّŒ‰)ú¥<©ŠçPb¨8Bk×ïìÕX3SÞ¬!íý¦[{„qP—¡¨Ä÷‰¨6:Ñ3‡NMòû,Ò¾jùšÜ\B‡â
~H“÷›°QÇ'düÜèäœuع”s“|#QyÍÏâÚo.8é-ˆVm™*'õìyiÜY4ðH<«]…´2?bó–€J4Þ!':qû‚µ% Ôåí“ìIÀø+2¥ÃνO&g%èy8«6ъ’-ßrÔM q™Í$ãzòQ603m†C‘Ó…ªζJ%+ùa½Yi|x°c‘Øp9&QßNøÂ³£p«ÀCmTUñ¢Wˆ/M¥d…åe“D¸ë©ÿûpœ˜•\Xì:f—L×z”c«åÊÁ\ai:›H×°vhb¶BÑSsÈ¡×Ý?|¼MŸotpӔïH‘é’áåïŸeñìû†Ø”TÑYø¬ËL¿À>#Šîü^ekÅb%&Nöàö,çâ…Q2Ó“/ñ],0R‰åH¼‡0`£ÉŠs¨è

    /// This member is ignored if dwModeFlags does not contain DBIMF_VARIABLEHEIGHT.

    /// The band container will attempt to use these values, but the band is not guaranteed to be this size.

    /// This member is ignored if dwModeFlags does not contain the DBIMF_BKCOLOR flag.

See the DMCOLOR, DMDUP and DMCOLLATE enums for more details.

The Load method is needed because there's no way (that I can find) to have Marshal automatically put the trailing bytes into the Buffer array. I have invented the "DNS_RPC_RECORD_HEADER" type so that I can use PtrToStructure to load all the constant-sized parts automatically.

struct DOMAIN_CONTROLLER_INFO

    public string    DomainControllerName;

    public string    DomainControllerAddress;

    public uint    DomainControllerAddressType;

    public Guid    DomainGuid;

    public string    DomainName;

Structure DOMAIN_CONTROLLER_INFO

        public DRIVE_LAYOUT_INFORMATION_UNION DriveLayoutInformaiton;

    internal struct DSROLE_PRIMARY_DOMAIN_INFO_BASIC

        public string DomainNameFlat;

        public string DomainNameDns;

        public string DomainForestName;

        public Guid DomainGuid;

Structure DSROLE_PRIMARY_DOMAIN_INFO_BASIC

struct DS_DOMAIN_CONTROLLER_INFO_2 {

     [MarshalAs(UnmanagedType.LPTStr)] public string ComputerObjectName;     // CN=server1,OU=Domain Controllers,DC=dom1,DC=ad,DC=sys

Structure DS_DOMAIN_CONTROLLER_INFO_2

returned by DsGetDomainControllerInfo()

  string pDomain;

    public struct DWM_THUMBNAIL_PROPERTIES

Used with DwmUpdateThumbnailProperties.

    public string DrEmailAddress;

This structure is allocated by a user-mode application. It is a container for a reply that the application sends in response to a message received from a kernel-mode minifilter or minifilter instance.

    DVASPECT_THUMBNAIL = 2,

    //     The data is in the streams and storages contained by this IStorage instance.

    DVASPECT_THUMBNAIL = 2

    '     The data is in the streams and storages contained by this IStorage instance.

The GUITHREADINFO structure contains information about a graphical user interface (GUI) thread. For example you can get the caret (blinking cursor in textfields) position

    ''' Note that some OSs and/or programs may fail if the header is not a multiple of 512 bytes.

    ''' The program can't be loaded if there isn't at least this much memory available to it.

    ''' Normally, the OS reserves all the remaining conventional memory for your program,

    ''' Overlay number. Overlay number. Normally zero, meaning that it's the main program.

     ' Note that some OSes and/or programs may fail if the header is not a multiple of 512 bytes.

     ' The program can't be loaded if there isn't at least this much memory available to it.

     ' Normally, the OS reserves all the remaining conventional memory for your program, but

     ' Overlay number. Overlay number. Normally zero, meaning that it's the main program.