C / C++ / MFC

1. Add a public bool m_bInitialized member to your CDlgLists class and set it to false in the view's constructor.
   
   
2. Override CView::OnInitialUpdate() and set m_bInitialized to true.
   
   
3. Modify the problem code to check if m_bInitialized is true before mucking with the view's controls.

POSITION pos = pDoc->GetFirstViewPosition();
while (pos!=NULL)
{
    CDlgLists* pView = (CDlgLists*)(pDoc->GetNextView(pos));
    ASSERT_VALID(pView);

    <code>if(NULL != pView->m_list1.GetSafeHwnd())</code>
    {
        pView->m_list1.DeleteAllItems();

        pView->PostMessage(WM_COMMAND, IDC_BUTTONHIDEV2,0);

    }
}

CView*  pView;


POSITION pos;

pos    =   pDoc->GetFirstViewPosition();

while( pos != NULL )
{
    pView = pDoc->GetNextView( pos );

    if( pView->IsKindOf( pViewClass ) )
    {
        pView->GetParentFrame()->ActivateFrame();

        return TRUE;
    }
}


pChild = (CMDIChildWnd*) pTemplate->CreateNewFrame(pDoc, NULL );