RadioDld.NativeMethods.SendMessage C# (CSharp) Method

        public static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, ref HDITEM lParam);

        protected override void WndProc(ref Message m)
        {
            switch (m.Msg)
            {
            case NativeMethods.WM_CREATE:
                if (OsUtils.WinXpOrLater())
                {
                    // Set the theme of the control to "explorer", to give the
                    // correct styling under Vista.  This has no effect under XP.
                    Marshal.ThrowExceptionForHR(NativeMethods.SetWindowTheme(this.Handle, "explorer", null));
                }

                // Remove the focus rectangle from the control (and as a side effect, all other controls on the
                // form) if the last input event came from the mouse, or add them if it came from the keyboard.
                NativeMethods.SendMessage(this.Handle, NativeMethods.WM_CHANGEUISTATE, this.MakeLParam(NativeMethods.UIS_INITIALIZE, NativeMethods.UISF_HIDEFOCUS), IntPtr.Zero);
                break;

            case NativeMethods.LVM_SETEXTENDEDLISTVIEWSTYLE:
                if (OsUtils.WinXpOrLater())
                {
                    int styles = (int)m.LParam;

                    if ((styles & NativeMethods.LVS_EX_DOUBLEBUFFER) != NativeMethods.LVS_EX_DOUBLEBUFFER)
                    {
                        styles   = styles | NativeMethods.LVS_EX_DOUBLEBUFFER;
                        m.LParam = (IntPtr)styles;
                    }
                }

                break;

            case NativeMethods.WM_SETFOCUS:
                // Remove the focus rectangle from the control (and as a side effect, all other controls on the
                // form) if the last input event came from the mouse, or add them if it came from the keyboard.
                NativeMethods.SendMessage(this.Handle, NativeMethods.WM_CHANGEUISTATE, this.MakeLParam(NativeMethods.UIS_INITIALIZE, NativeMethods.UISF_HIDEFOCUS), IntPtr.Zero);
                break;

            case NativeMethods.WM_NOTIFY:
                // Test to see if the notification was for a right-click in the header
                if (((NativeMethods.NMHDR)m.GetLParam(typeof(NativeMethods.NMHDR))).code == NativeMethods.NM_RCLICK)
                {
                    // Fire an event to indicate the click has occurred.  Set the column number
                    // to -1 for all clicks, as this information isn't currently required.
                    if (this.ColumnRightClick != null)
                    {
                        this.ColumnRightClick(this, new ColumnClickEventArgs(-1));
                    }
                }

                break;

            case NativeMethods.WM_PAINT:
                if (this.View != View.Details)
                {
                    break;
                }

                // Calculate the position of all embedded controls
                foreach (KeyValuePair <ListViewItem, EmbeddedProgress> embedded in this.embeddedInfo)
                {
                    Rectangle rect = this.GetSubItemBounds(embedded.Key, embedded.Value.Column);

                    if (((this.HeaderStyle != ColumnHeaderStyle.None) && (rect.Top < this.Font.Height)) || (rect.Top + rect.Height) <= 0 || (rect.Top > this.ClientRectangle.Height))
                    {
                        // Control overlaps ColumnHeader, is off the top, or is off the bottom of the listview
                        embedded.Value.Progress.Visible = false;
                        continue;
                    }
                    else
                    {
                        embedded.Value.Progress.Visible = true;
                    }

                    // Set embedded control's bounds
                    embedded.Value.Progress.Bounds = rect;
                }

                break;
            }

            base.WndProc(ref m);
        }