/IssueTrackerOutlookAddin/OUTLOOK-PLUS-SERVICES-ADDIN-LIBRARY/PictureDispConverter.cs

// Microsoft Office Outlook 2007 Add-in Sample Code

//

// THIS CODE AND INFORMATION ARE PROVIDED AS IS WITHOUT WARRANTY OF ANY

// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE

// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.

// 

using System;

using System.Drawing;

using System.Collections.Generic;

using System.Runtime.InteropServices;



///

/// Outlook requires a specific image format which is different than BMP/JPG, etc.

/// This object support conversion of standard types into the types required by Outlook

/// 

namespace Microsoft.SoftwarePlusServices.ReferenceBits.OutlookPlusServices

{

    ///

    /// <summary>

    /// Convers binary and image data to a IPictureDisp interface using Win32 API functions.

    /// </summary>

    ///

    public static class PictureDispConverter

    {

        #region Private Fields

        private static Guid _iPictureDispGuid = typeof(stdole.IPictureDisp).GUID;

        #endregion



        #region Public Methods



        ///

        /// <summary>

        /// Converts an Icon to a IPictureDisp interface.

        /// </summary>

        /// <param name="icon">The Icon object to convert.</param>

        /// <returns>The IPictureDisp interface representing the image.</returns>

        ///

        public static stdole.IPictureDisp ToIPictureDisp(Icon icon)

        {

            PICTDESC.Icon pictIcon = new PICTDESC.Icon(icon);

            return PictureDispConverter.OleCreatePictureIndirect(pictIcon, ref _iPictureDispGuid, true);

        }



        ///

        /// <summary>

        /// Converts an Image to a IPictureDisp interface.

        /// </summary>

        /// <param name="icon">The Image object to convert.</param>

        /// <returns>The IPictureDisp interface representing the image.</returns>

        ///

        public static stdole.IPictureDisp ToIPictureDisp(Image image)

        {

            Bitmap bitmap = image as Bitmap;

            if (bitmap == null)

                bitmap = new Bitmap(image);



            PICTDESC.Bitmap pictBit = new PICTDESC.Bitmap(bitmap);

            return PictureDispConverter.OleCreatePictureIndirect(pictBit, ref _iPictureDispGuid, true);

        }

        #endregion



        #region Win32 Imports

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1060:MovePInvokesToNativeMethodsClass")]

        [DllImport("OleAut32.dll", EntryPoint = "OleCreatePictureIndirect", ExactSpelling = true, PreserveSig = false)]

        private static extern stdole.IPictureDisp OleCreatePictureIndirect([MarshalAs(UnmanagedType.AsAny)] object picdesc, ref Guid iid, [MarshalAs(UnmanagedType.Bool)] bool fOwn);



        // WINFORMS COMMENT:

        // PICTDESC is a union in native, so we'll just

        // define different ones for the different types

        // the "unused" fields are there to make it the right

        // size, since the struct in native is as big as the biggest

        // union.

        private static class PICTDESC

        {

            //Picture Types

            public const short PICTYPE_UNINITIALIZED = -1;

            public const short PICTYPE_NONE = 0;

            public const short PICTYPE_BITMAP = 1;

            public const short PICTYPE_METAFILE = 2;

            public const short PICTYPE_ICON = 3;

            public const short PICTYPE_ENHMETAFILE = 4;



            [StructLayout(LayoutKind.Sequential)]

            public class Icon

            {

                internal int cbSizeOfStruct = Marshal.SizeOf(typeof(PICTDESC.Icon));

                internal int picType = PICTDESC.PICTYPE_ICON;

                internal IntPtr hicon = IntPtr.Zero;

                internal int unused1;

                internal int unused2;



                internal Icon(System.Drawing.Icon icon)

                {

                    this.hicon = icon.ToBitmap().GetHicon();

                }

            }



            [StructLayout(LayoutKind.Sequential)]

            public class Bitmap

            {

                internal int cbSizeOfStruct = Marshal.SizeOf(typeof(PICTDESC.Bitmap));

                internal int picType = PICTDESC.PICTYPE_BITMAP;

                internal IntPtr hbitmap = IntPtr.Zero;

                internal IntPtr hpal = IntPtr.Zero;

                internal int unused;



                internal Bitmap(System.Drawing.Bitmap bitmap)

                {

                    this.hbitmap = bitmap.GetHbitmap();

                }

            }

        }

        #endregion

    }

}