BrightIdeasSoftware.ObjectListView.HandleKeyDown C# (CSharp) Method

        protected virtual bool HandleKeyDown(ref Message m)
        {
            // If this is a checkbox list, toggle the selected rows when the user presses Space
            if (this.CheckBoxes && m.WParam.ToInt32() == (int)Keys.Space && this.SelectedIndices.Count > 0) {
                this.ToggleSelectedRowCheckBoxes();
                return true;
            }

            // Remember the scroll position so we can decide if the listview has scrolled in the
            // handling of the event.
            int scrollPositionH = NativeMethods.GetScrollPosition(this, true);
            int scrollPositionV = NativeMethods.GetScrollPosition(this, false);

            base.WndProc(ref m);

            // It's possible that the processing in base.WndProc has actually destroyed this control
            if (this.IsDisposed)
                return true;

            // If the keydown processing changed the scroll position, trigger a Scroll event
            int newScrollPositionH = NativeMethods.GetScrollPosition(this, true);
            int newScrollPositionV = NativeMethods.GetScrollPosition(this, false);

            if (scrollPositionH != newScrollPositionH) {
                ScrollEventArgs args = new ScrollEventArgs(ScrollEventType.EndScroll,
                    scrollPositionH, newScrollPositionH, ScrollOrientation.HorizontalScroll);
                this.OnScroll(args);
                this.RefreshHotItem();
            }
            if (scrollPositionV != newScrollPositionV) {
                ScrollEventArgs args = new ScrollEventArgs(ScrollEventType.EndScroll,
                    scrollPositionV, newScrollPositionV, ScrollOrientation.VerticalScroll);
                this.OnScroll(args);
                this.RefreshHotItem();
            }

            return true;
        }