// Same as clicking on an hyperlink
        void IInvokeProvider.Invoke()
        {
            // Check that button can be clicked.
            //
            // @



            // Make sure that the control is enabled
            if (!SafeNativeMethods.IsWindowEnabled(_hwnd))
            {
                throw new ElementNotEnabledException();
            }

            if (!SafeNativeMethods.IsWindowVisible(_hwnd))
            {
                throw new InvalidOperationException(SR.Get(SRID.OperationCannotBePerformed));
            }

            //
            // Get the bounding rect for the window.
            //
            NativeMethods.Win32Rect BoundingRect = NativeMethods.Win32Rect.Empty;
            if (!Misc.GetWindowRect(_hwnd, ref BoundingRect))
            {
                return;
            }

            //
            // All we really need here are the height and the width,
            // so we don't even need to translate between screen
            // and client coordinates.
            //
            int width = BoundingRect.right - BoundingRect.left;
            int height = BoundingRect.bottom - BoundingRect.top;

            //
            // Determine the point to click.
            //
            // @














            for (int Resolution = 10; Resolution > 0; --Resolution)
            {
                for (int x = 1; x <= width; x += Resolution)
                {
                    for (int y = 1; y <= height; y += Resolution)
                    {
                        //
                        // Send the link an LM_HITTEST message.
                        //
                        // Allocate a local hit test info struct.
                        UnsafeNativeMethods.LHITTESTINFO HitTestInfo = new UnsafeNativeMethods.LHITTESTINFO();

                        // Fill in the coordinates that we want to check.
                        HitTestInfo.pt.x = x;
                        HitTestInfo.pt.y = y;

                        // Fill in index and state info.
                        HitTestInfo.item.mask = NativeMethods.LIF_ITEMINDEX | NativeMethods.LIF_STATE;
                        HitTestInfo.item.iLink = 0;
                        HitTestInfo.item.stateMask = NativeMethods.LIS_ENABLED;
                        HitTestInfo.item.state = 0;

                        bool bGetItemResult;
                        unsafe
                        {
                            // Send the LM_HITTEST message.
                            bGetItemResult = XSendMessage.XSend(_hwnd, NativeMethods.LM_HITTEST, IntPtr.Zero, new IntPtr(&HitTestInfo), Marshal.SizeOf(HitTestInfo.GetType()));
                        }

                        if (bGetItemResult == true && HitTestInfo.item.iLink == _item)
                        {
                            //
                            // N.B. [SEdmison]:
                            // This multiplication is essentially just
                            // a left shift by one word's width; in
                            // Win32 I'd just use my trusty MAKELONG macro,
                            // but C# doesn't give me that option.
                            //
                            Misc.ProxySendMessage(_hwnd, NativeMethods.WM_LBUTTONDOWN, IntPtr.Zero, NativeMethods.Util.MAKELPARAM(x, y));
                            Misc.ProxySendMessage(_hwnd, NativeMethods.WM_LBUTTONUP, IntPtr.Zero, NativeMethods.Util.MAKELPARAM(x, y));
                            return;
                        }
                    }
                }
            }
         }
        // Returns a Proxy element corresponding to the specified
        // screen coordinates.
        internal override ProxySimple ElementProviderFromPoint (int x, int y)
        {
            //
            // Send the link an LM_HITTEST message.
            //
            // Allocate a local hit test info struct.
            UnsafeNativeMethods.LHITTESTINFO HitTestInfo = new UnsafeNativeMethods.LHITTESTINFO();

            // Fill in the coordinates that we want to check.
            HitTestInfo.pt.x = x;
            HitTestInfo.pt.y = y;

            // Convert screen coordinates to client coordinates.
            if (!Misc.MapWindowPoints(IntPtr.Zero, _hwnd, ref HitTestInfo.pt, 1))
            {
                base.ElementProviderFromPoint(x, y);
            }

            // Fill in index and state info.
            HitTestInfo.item.mask = NativeMethods.LIF_ITEMINDEX | NativeMethods.LIF_STATE;
            HitTestInfo.item.iLink = 0;
            HitTestInfo.item.stateMask = NativeMethods.LIS_ENABLED;
            HitTestInfo.item.state = 0;

            bool bGetItemResult;
            unsafe
            {
                // Send the LM_HITTEST message.
                bGetItemResult = XSendMessage.XSend(_hwnd, NativeMethods.LM_HITTEST, IntPtr.Zero, new IntPtr(&HitTestInfo), Marshal.SizeOf(HitTestInfo.GetType()));
            }

            if (bGetItemResult == true && HitTestInfo.item.iLink >= 0 && GetLinkItem (HitTestInfo.item.iLink))
            {
                return CreateHyperlinkItem (_linkItem, HitTestInfo.item.iLink);
            }

            return base.ElementProviderFromPoint (x, y);
        }