// AForge Video for Windows Library
// AForge.NET framework
// http://www.aforgenet.com/framework/
//
// Copyright © AForge.NET, 2007-2011
// contacts@aforgenet.com
//

namespace AForge.Video.DirectShow.Internals
{
    using System;
    using System.Runtime.InteropServices;
    using System.Runtime.InteropServices.ComTypes;

    /// <summary>
    /// Some Win32 API used internally.
    /// </summary>
    /// 
    internal static class Win32
    {
        /// <summary>
        /// Supplies a pointer to an implementation of <b>IBindCtx</b> (a bind context object).
        /// This object stores information about a particular moniker-binding operation.
        /// </summary>
        /// 
        /// <param name="reserved">Reserved for future use; must be zero.</param>
        /// <param name="ppbc">Address of <b>IBindCtx*</b> pointer variable that receives the
        /// interface pointer to the new bind context object.</param>
        /// 
        /// <returns>Returns <b>S_OK</b> on success.</returns>
        /// 
        [DllImport( "ole32.dll" )]
        public static extern
        int CreateBindCtx( int reserved, out IBindCtx ppbc );

        /// <summary>
        /// Converts a string into a moniker that identifies the object named by the string.
        /// </summary>
        /// 
        /// <param name="pbc">Pointer to the IBindCtx interface on the bind context object to be used in this binding operation.</param>
        /// <param name="szUserName">Pointer to a zero-terminated wide character string containing the display name to be parsed. </param>
        /// <param name="pchEaten">Pointer to the number of characters of szUserName that were consumed.</param>
        /// <param name="ppmk">Address of <b>IMoniker*</b> pointer variable that receives the interface pointer
        /// to the moniker that was built from <b>szUserName</b>.</param>
        /// 
        /// <returns>Returns <b>S_OK</b> on success.</returns>
        /// 
        [DllImport( "ole32.dll", CharSet = CharSet.Unicode )]
        public static extern
        int MkParseDisplayName( IBindCtx pbc, string szUserName,
            ref int pchEaten, out IMoniker ppmk );

        /// <summary>
        /// Copy a block of memory.
        /// </summary>
        /// 
        /// <param name="dst">Destination pointer.</param>
        /// <param name="src">Source pointer.</param>
        /// <param name="count">Memory block's length to copy.</param>
        /// 
        /// <returns>Return's the value of <b>dst</b> - pointer to destination.</returns>
        /// 
        [DllImport( "ntdll.dll", CallingConvention = CallingConvention.Cdecl )]
        public static unsafe extern int memcpy(
            byte* dst,
            byte* src,
            int count );

        /// <summary>
        /// Invokes a new property frame, that is, a property sheet dialog box.
        /// </summary>
        /// 
        /// <param name="hwndOwner">Parent window of property sheet dialog box.</param>
        /// <param name="x">Horizontal position for dialog box.</param>
        /// <param name="y">Vertical position for dialog box.</param>
        /// <param name="caption">Dialog box caption.</param>
        /// <param name="cObjects">Number of object pointers in <b>ppUnk</b>.</param>
        /// <param name="ppUnk">Pointer to the objects for property sheet.</param>
        /// <param name="cPages">Number of property pages in <b>lpPageClsID</b>.</param>
        /// <param name="lpPageClsID">Array of CLSIDs for each property page.</param>
        /// <param name="lcid">Locale identifier for property sheet locale.</param>
        /// <param name="dwReserved">Reserved.</param>
        /// <param name="lpvReserved">Reserved.</param>
        /// 
        /// <returns>Returns <b>S_OK</b> on success.</returns>
        /// 
        [DllImport( "oleaut32.dll" )]
        public static extern int OleCreatePropertyFrame(
            IntPtr hwndOwner,
            int x,
            int y,
            [MarshalAs( UnmanagedType.LPWStr )] string caption,
            int cObjects,
            [MarshalAs( UnmanagedType.Interface, ArraySubType = UnmanagedType.IUnknown )] 
            ref object ppUnk,
            int cPages,
            IntPtr lpPageClsID,
            int lcid,
            int dwReserved,
            IntPtr lpvReserved );
    }
}