Ejemplo n.º 1
0
        public void CreateAndShow(IntPtr sourceWindow)
        {
            // register the thumbnail to associate this form's hwnd (where we
            // want the thumbnail rendered to) with the parent hwnd
            // (which is the window we want the thumbnail of) and put the info
            // in the thumbnail handle
            m_hThumbnail = DwmApi.DwmRegisterThumbnail(this.Handle, sourceWindow);

            // create and set a thumbnail properties to tell the DWM
            // how we want the thumbnail to be rendered.
            DwmApi.DWM_THUMBNAIL_PROPERTIES m_ThumbnailProperties = new DwmApi.DWM_THUMBNAIL_PROPERTIES();

            m_ThumbnailProperties.dwFlags = DwmApi.DWM_THUMBNAIL_PROPERTIES.DWM_TNP_VISIBLE
                                            + DwmApi.DWM_THUMBNAIL_PROPERTIES.DWM_TNP_OPACITY
                                            + DwmApi.DWM_THUMBNAIL_PROPERTIES.DWM_TNP_RECTDESTINATION
                                            + DwmApi.DWM_THUMBNAIL_PROPERTIES.DWM_TNP_SOURCECLIENTAREAONLY;
            m_ThumbnailProperties.opacity  = 255;
            m_ThumbnailProperties.fVisible = true;
            m_ThumbnailProperties.rcSource = m_ThumbnailProperties.rcDestination =
                new DwmApi.RECT(0, 0, ClientRectangle.Right, ClientRectangle.Bottom);



            m_ThumbnailProperties.fSourceClientAreaOnly = true;

            // now update the thumbnail properties - this actually starts the live rendering
            // in the thumbnail
            DwmApi.DwmUpdateThumbnailProperties(m_hThumbnail, m_ThumbnailProperties);

            this.Show();
            object j = (object)this.ClientRectangle;
            //this.DrawToBitmap(Bitmap.FromFile());
        }
Ejemplo n.º 2
0
        protected override void Dispose(bool disposing)
        {
            //if (disposing && (components != null)) components.Dispose();
            base.Dispose(disposing);

            // when you are done with the thumbnail, unregister it
            if (m_hThumbnail != IntPtr.Zero)
            {
                if (DwmApi.DwmIsCompositionEnabled())
                {
                    DwmApi.DwmUnregisterThumbnail(m_hThumbnail);
                }
                try
                {
                    m_hThumbnail = IntPtr.Zero;
                }
                catch (Exception excnorg) { this.Dispose(); }
            }
        }