How to added a CXTPControlboBox to ...

1, class CMainFrame : public CXTPFrameWnd
{
....
CXTComboBoxEx m_wndSelect;
....
};

CMainFrame::OnCreateControl(....)
{
  if (  ...->nID== IDC_SELECT)
  {
     wndSelect.Create(....);
    ...
  }

this is ok.

but:
2,
CMainFrame::OnCreateControl(....)
{
  if (  ...->nID== IDC_SELECT)
  {
     CXTPControlComboBox* box= new CXTPControlComboBox
     box->InsertString(0,"xxx");
     box->Set....
    
     lpCreateControl->pControl = box;
    ...
  }
when run the app,the combobox is displayed,but it is disabled!Can not click on it.

which is right?how to do?

thank you very much.
the IDC_SELECT combobox is ok now.but the toolbar has many control,such as edit,button.I Use rang update,but a button not be called!

I move the update handle to the view file.the update handle not be called!

YES!It is!Now the controls are all ok!

But how to get the input string of a edit control? And how to get button clicked message and do something?

My APP is a SDI.How to receive the toolbar button clicked message in myview?