C / C++ / MFC

CHAR pFileChunk[1024];
CFile arch;
CString linea;
 
if(arch.Open(("c:\\archivo.txt", CFile::modeRead ))
{
     arch.Read(pFileChunk, 1024);
     linea = CString(pFileChunk);
}

char Buffer[1025];<br />
arch.Read(Buffer,1024);

void CPPDlgParametritzacions::OnItemchangedLctrlIntroduccio(NMHDR* pNMHDR, LRESULT* pResult) 
{
	NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;

	// if the item is not the same that was selected before and there's one item to process...
	if ((pNMListView->iItem != this->m_iElementSeleccionatAnt) && (pNMListView->iItem != -1))
	{
		// remember which item has been selected in a member var of the dialog class that holds the listCtrl, you can also derive a listctrl and make this internally...
		this->m_iElementSeleccionatAnt = pNMListView->iItem;

		// depending on the selected state of the current item...
		if (this->m_cLCtrlParametritzacions.GetItemState(pNMListView->iItem, LVIS_SELECTED) == LVIS_SELECTED)
		{

::OnItemChanged(...) {
    static bool flag = false;
    if (flag) return;

    ...

    if (some condition)
    {
        flag = true; //lock-out OnItemChanged
        list1.SetItemState(...);
        flag = false; //re-enable OnItemChanged
    }

    ...    
}

YourClass::OnItemChanged(NMHDR* pNMHDR, LRESULT* pResult)
{
    NMLISTVIEW* pNMLV = reinterpret_cast<NMLISTVIEW*>(pNMHDR);
    //assuming you're only interested in the new selection, so check
    //whether the LVIS_SELECTED state is set
    if (!(pNMLV->uNewState & LVIS_SELECTED)) return;
 
    //Make sure m_CurrentSelection is initialised in the constructor to
    //an invalid value like -1, so that this works for the first selection.
 
    //This checks that we're not just resetting the selection back to the 
    //current one.
    if (pNMLV->iItem == m_CurrentSelection) return;
  
    if (whatever_condition_your_checking_is_okay)
    {
        //allow the new selection
        m_CurrentSelection = pNMLV->iItem;        
    }
    else
    {
        //go back to the old selection
        m_List.SetItemState(m_CurrentSelection, LVIS_SELECTED, LVIS_SELECTED);
    }
}