Shorcut Key with splitbutton

I have a commandbar with xtpcontrolsplibutton. With this splitbutton i have a list. In fact the button is designed for Undo / Redo action. Before I change the button i have an shortcut key assigne to this button but now the keyboard sequence doesn't work

How can I handle this ? when the user launch the keyboard sequence ( CTRL+Z for instance ), the action of the button start.

User can change the bind key too.

thanks, in advance

I find the reason. In fact when i change the button to splitbuttonpopup i deleted Oncommand macro to replace bay ON_XTP_EXECUTE. Then i have an other question

On ON_XTP_EXECUTE function was calling by NMHDR* pNMHDR and LRESULT* pResult . The NMHDR is a standard NMHDR or NMXTPCONTROL ?

Ok thanks. In fact i do this

CXTPControls* l_CmdList = ( ( CAPBMainFrame*)AfxGetApp( )->m_pMainWnd )->m_TbStandard->GetControls();     CXTPControl* l_CmdUndo = l_CmdList->FindControl( xtpControlSplitButtonPopup, ID_EDIT_UNDO, TRUE, TRUE);     l_CmdUndo->OnExecute( );

it's a good way or it's better to construct NMXTPCONTROL and sending the message through the commandbar ?

Thanks it's really good idea . ( i saw my mistake when i built the program  )