CListCtrl with checkboxes questions

Question

The List Control is defined as Single Selection on the resources.

Question 1

I want to have a checkbox on the header of first column of my <

Answer 1

Insert the column headers first. Then change the HDF_CHECKBOX. For example:

m_list.SetExtendedStyle(LVS_EX_CHECKBOXES| LVS_EX_FULLROWSELECT);

CHeaderCtrl &header = *m_list.GetHeaderCtrl();
header.ModifyStyle(0, HDS_CHECKBOXES);

m_list.InsertColumn(0, L"Column0", 0, 120, 0);
m_list.InsertColumn(1, L"Column1", 0, 80, 1);
m_list.InsertColumn(2, L"Column2", 0, 80, 2);

HDITEM hdi = { 0 };
hdi.mask = HDI_FORMAT;
header.GetItem(0, &hdi);
hdi.fmt |= HDF_CHECKBOX;
header.SetItem(0, &hdi);

m_list.InsertItem(m_list.GetItemCount(), L"C0", 0);
m_list.InsertItem(m_list.GetItemCount(), L"C1", 0);

m_list.SetCheck(0, 1);
m_list.SetCheck(1, 1);

When handling the notification you can use the GetCheck method to see if item is checked or not. Example:

if(pNMListView->uChanged & LVIF_STATE)
{
    if(pNMListView->uNewState & LVIS_SELECTED)
    {
        ...
    }
    else if(pNMListView->uNewState & LVIS_STATEIMAGEMASK && pNMListView->iItem >= 0)
    {
        if(m_list.GetCheck(pNMListView->iItem))
            TRACE("%d checked\n", pNMListView->iItem);
    }
}