ObjectEditor.frmMain.panelProperties_Selecting C# (CSharp) Метод

        private void panelProperties_Selecting(object sender, TabControlCancelEventArgs e)
        {
            if (CurrentProto == null) return;
            TabPage Tab=GetTabPageByItemType(CurrentProto.Type);
            if(Tab==null) return;
            if (Tab != e.TabPage)
                e.Cancel = Config.LockTabs;
            else
                WinAPI.SetWindowExFlag(MainObj.Handle, (int)Win32.WS_EX_COMPOSITED);
        }