Toolbar button selection menu is disabled

Hi,

I added a toolbar at run time like this:

...
ON_XTP_EXECUTE_RANGE(ID_TOOLBAR_B1,ID_TOOLBAR_B6,OnButtons)
...

CXTPToolBar* pBar1 = (CXTPToolBar*)pCommandBars->Add(_T("test"), xtpBarTop);
 if(pBar1)
 {
  pBar1->SetIconSize(CSize(24,24));
  pBar1->SetButtons(toolbar1_buttons,6);
 }
...

I have two questions:

1. The toolbar buttons are disabled by default, until I add a  ON_COMMAND_RANGE(ID_TOOLBAR_B1,ID_TOOLBAR_B6,OnFavorit e) . So I want to know what's the difference between the command in XTP_EXECUTE handler and COMMAND_RANGE handler.

2. After I added the ON_COMMAND_RANGE, the toolbar buttons are enable, but the toolbar's customize menu (used to add/remove a button) is still disabled, I can not add/remove any buttons through that menu.

I am using XT 8.6.