C / C++ / MFC

void CExtract::GetInfo(const CString& m_FileName, CString& n_str, CString& e_str, int* n_strlen, int* e_strlen, UINT* keyID)
{
n_str ="1234";
e_str = "578756";
*n_strlen = 4;
*e_strlen = 6;
*keyID = 48756;
}

//  and calling
m_Proc.GetInfo(FileName, n_str, e_str, &n_strlen, &e_strlen, &k_keyID);

typedef struct 
{
	DWORD Version;
	DWORD QueryPosition;
	DWORD GridPosition;
	DWORD ChartPosition;
	DWORD NotePosition;
	BOOL IsStatic;
}HEADER;

HEADER header;

header.Version = (DWORD)1.0;
header.QueryPosition = 1230;
header.GridPosition = 0;
header.ChartPosition = 0;
header.IsStatic = TRUE;

pFile.Open(strFileName, CFile::typeBinary | CFile::modeCreate | CFile::modeWrite);
pFile.Write(&header, sizeof(HEADER));

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 );