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

        private IntPtr DropDownHook(int code, IntPtr wparam, IntPtr lparam)
        {
            if (code == NativeMethods.MSGF_MENU)
            {
                NativeMethods.MSG msg = (NativeMethods.MSG) Marshal.PtrToStructure(lparam, typeof(NativeMethods.MSG));
                Message message = Message.Create(msg.hwnd, msg.message, msg.wParam, msg.lParam);
                if (this.DropDownFilter(ref message))
                {
                    return (IntPtr)1;
                }
            }

            return NativeMethods.CallNextHookEx(this.hookHandle, code, wparam, lparam);
        }