Objective Grid: Adding a toolbar to a MDI child window with a CGXGridView

Problem

How do I add a toolbar to an MDI child window with a CGXGridView? I've added the toolbar per MS KBase article Q155141, but my app keeps ASSERTING before anything is visible.

Cause

The problem occurs because the toolbar posts OnUpdateCommandUI() command messages before Grid's OnInitialUpdate() is called. This means that m_pParam is NULL when CanCut(), CanEdit(), CanPaste(), etc... are called.
 

Action

To get around this, you need to include a check in your OnUpdateCommandUI() handler for m_pParam == NULL.

Example:

        void CMyGridView::OnUpdateEditCopy(CCmdUI* pCmdUI)
        {
                if(m_pParam) 
                        CGXGridView::OnUpdateEditCopy(pCmdUI); 
        }

You can also disable all OnUpdate() notifications until the grid has been correctly initialized by overriding OnCmdMsg():

        BOOL CMyGridView::OnCmdMsg(UINT nID, int nCode, void* pExtra, AFX_CMDHANDLERINFO* pHandlerInfo)
        {
                if (m_pParam == NULL || !m_bInitDone)
                        return TRUE;
        
                return CGXGridView::OnCmdMsg(nID, nCode, pExtra, pHandlerInfo);
        }