System.Windows.Forms.CommandBar.WndProc C# (CSharp) Method

        protected override void WndProc(ref Message message)
        {
            base.WndProc(ref message);

            switch (message.Msg)
            {
                case NativeMethods.WM_COMMAND + NativeMethods.WM_REFLECT:
                    int index = (int) message.WParam & 0xFFFF;
                    this.PerformClick(this.items[index]);
                    base.WndProc(ref message);
                    this.ResetMouseEventArgs();
                    break;

                case NativeMethods.WM_MENUCHAR:
                    this.WmMenuChar(ref message);
                    break;

                case NativeMethods.WM_NOTIFY:
                case NativeMethods.WM_NOTIFY + NativeMethods.WM_REFLECT:
                    NativeMethods.NMHDR note = (NativeMethods.NMHDR) message.GetLParam(typeof(NativeMethods.NMHDR));
                    switch (note.code)
                    {
                        case NativeMethods.TTN_NEEDTEXTA:
                            NotifyNeedTextA(ref message);
                            break;

                        case NativeMethods.TTN_NEEDTEXTW:
                            NotifyNeedTextW(ref message);
                            break;

                        case NativeMethods.TBN_QUERYINSERT:
                            message.Result = (IntPtr) 1;
                            break;

                        case NativeMethods.TBN_DROPDOWN:
                            this.NotifyDropDown(ref message);
                            break;

                        case NativeMethods.NM_CUSTOMDRAW:
                            this.NotifyCustomDraw(ref message);
                            break;

                        case NativeMethods.TBN_HOTITEMCHANGE:
                            break;
                    }
                    break;
            }
        }