Disable a Button on a toolbar

I am having trouble disabling buttons on a toolbar made with the resource editor in Visual C++.

I am trying to disable certain buttons on the bar when a setting is changed.
I am running the below code in the frame of the MDI child window.

CToolBarCtrl * pTBCtrl = &m_wndTimeLineBar.GetToolBarCtrl();
pTBCtrl->EnableButton(ID_VIEW_EVENTS,0);

The code runs with no errors, but doesn't appear to do anything.
JoyBurkeAsked:
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AndyAinscowFreelance programmer / ConsultantCommented:
Hava an ON_UPDATE_COMMAND_UI handler

eg.
void CPaymentFrame::OnUpdateMyfilePrint(CCmdUI* pCmdUI)
{
      pCmdUI->Enable(false);      //not available

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System Programming

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