In some app like WinSpy/Spy++ to make adjustments to list controls. It can correctly set an app’s list control’s modes, alignments,
sorting, styles, and extended styles. It can also get the widths of the columns and count of items.

The problem is that you cannot seem to get the columns’ names or the item text. The app uses code like this, where lc is a pointer to the target app’s list control:

  lc->GetColumnWidth();
  lc->GetItemCount();
  lc->ModifyStyle();
  lc->SetExtendedStyle();
  lc->GetHeaderCtrl()->GetItemCount();

That all works fine, but when you try something like this, it doesn’t work:

  TCHAR colname[256]=_T("");
  LVCOLUMN lvcol;
  ZeroMemory(&lvcol, sizeof(lvcol));
  lvcol.mask=LVCF_TEXT;
  lvcol.cchTextMax=sizeof(colname)-1;
  lvcol.pszText=colname;
  lc->GetColumn(col, &lvcol);

GetColumn may return TRUE or FALSE, but the LVCOLUMN structure remains unchanged. If you tried using that same code in a test app to get the name of a column from that app’s own list control and it worked. It only seems to fail when use it from a different app.

Solution:

Well, there is no surprise here; in fact, if there is any surprise, it is that you did not manage to totally crash the target app (I presume that lc is a CListCtrl::FromHandle of an HWND in another process).

Think about this case:

you are passing the address of a data structure in YOUR process as a LPARAM-sized value to some totally different process, where that LPARAM value is completely and utterly meaningless.

David Ching did a remote-sendmessage DLL some time ago.  This essentially does DLL injection of the code so it is running in the target process; you can google for this by looking for SendMessageRemote.

http://www.dcsoft.com/private/sendmessageremote.cpp

8. Get Item Infomation

TCHAR szBuf[1024];
LVITEM lvi;
lvi.iItem = nItemIndex;
lvi.iSubItem = 0;
lvi.mask = LVIF_TEXT;
lvi.pszText = szBuf;
lvi.cchTextMax = 1024;
m_list.GetItem(&lvi);

More infomation: Q173242: Use Masks to Set/Get Item States in CListCtrl

9. Get the header titile of CListCtrl

LVCOLUMN lvcol;
char  str[256];
int   nColNum;
CString  strColumnName[MAX_COL];
nColNum = 0;
lvcol.mask = LVCF_TEXT;
lvcol.pszText = str;
lvcol.cchTextMax = 256;
while(m_list.GetColumn(nColNum, &lvcol))
{
    strColumnName[nColNum] = lvcol.pszText;
    nColNum++;
}

10. Scoll the scollbar to ensure item visible

m_list.EnsureVisible(i, FALSE);

11. Get the column count of CListCtrl

int nHeadNum = m_list.GetHeaderCtrl()->GetItemCount();

12. Delete all the columns

Method 1:

while ( m_list.DeleteColumn (0));

Once you delete the first column, the next columns will move above.

Method 2:

for (int i=nColumns-1; i>=0; i–)

          m_list.DeleteColumn (i);

13. Get the row and column index of the clicked item

Method 1:

void CTestDlg::OnClickList1(NMHDR* pNMHDR, LRESULT* pResult)
{
   DWORD dwPos = GetMessagePos();
   CPoint point( LOWORD(dwPos), HIWORD(dwPos) );
   m_list.ScreenToClient(&point);
   LVHITTESTINFO lvinfo;
   lvinfo.pt = point;
   lvinfo.flags = LVHT_ABOVE;
   int nItem = m_list.SubItemHitTest(&lvinfo);
   if(nItem != -1)
   {
        CString strtemp;
        strtemp.Format(“You clicked row %d column %d”, lvinfo.iItem, lvinfo.iSubItem);
        AfxMessageBox(strtemp);
   }
}

Method 2:

void CTestDlg::OnClickList1(NMHDR* pNMHDR, LRESULT* pResult)
{
   NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
   if(pNMListView->iItem != -1)
   {
        CString strtemp;
        strtemp.Format(“You clicked row %d column %d”,
                        pNMListView->iItem, pNMListView->iSubItem);
        AfxMessageBox(strtemp);
   }
}

14. Check if you clicked on the checkbox

void CTestDlg::OnClickList1(NMHDR* pNMHDR, LRESULT* pResult)
{
   DWORD dwPos = GetMessagePos();
   CPoint point( LOWORD(dwPos), HIWORD(dwPos) );
   m_list.ScreenToClient(&point);
   LVHITTESTINFO lvinfo;
   lvinfo.pt = point;
   lvinfo.flags = LVHT_ABOVE;
   UINT nFlag;
   int nItem = m_list.HitTest(point, &nFlag);
   if(nFlag == LVHT_ONITEMSTATEICON)
   {
        AfxMessageBox(“clicked on the checkbox”);
   }
   *pResult = 0;
}

15. pop up menu when right mouse button clicked

void CTestDlg::OnRclickList1(NMHDR* pNMHDR, LRESULT* pResult)
{
    NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
    if(pNMListView->iItem != -1)
    {
        DWORD dwPos = GetMessagePos();
        CPoint point( LOWORD(dwPos), HIWORD(dwPos) );
        CMenu menu;
        VERIFY( menu.LoadMenu( IDR_MENU1 ) );
        CMenu* popup = menu.GetSubMenu(0);
        ASSERT( popup != NULL );
        popup->TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON, point.x, point.y, this );
    }
    *pResult = 0;
}

1. CListCtrl style

       LVS_ICON: for each item displayed great icon

       LVS_SMALLICON: for each item displayed on the icon

       LVS_LIST: a show with a small icon on the item

       LVS_REPORT: Show item details

       You can inspect the Windows Explorer, just like “View” tab with “icon, small icon, list details”

2. CListctrl style and expand style

LONG lStyle;
lStyle = GetWindowLong (m_list.m_hWnd, GWL_STYLE); // Get the current window style
lStyle &= ~ LVS_TYPEMASK; // Clear display
lStyle |= LVS_REPORT; // set style
SetWindowLong (m_list.m_hWnd, GWL_STYLE, lStyle); // set style
DWORD dwStyle = m_list.GetExtendedStyle ();
dwStyle |= LVS_EX_FULLROWSELECT; // highlight the selected full row
dwStyle |= LVS_EX_GRIDLINES; // grid lines (with the style of the report)
dwStyle |= LVS_EX_CHECKBOXES; // checkbox controls
m_list.SetExtendedStyle (dwStyle); // set expand style

Note: Please check MSDN for style details.

3. Insert data

m_list.InsertColumn (0, “ID”, LVCFMT_LEFT, 40); // insert column
m_list.InsertColumn (1, “NAME”, LVCFMT_LEFT, 50);
int nRow = m_list.InsertItem (0, “11 “);// Row
m_list.SetItemText (nRow, 1, “jacky “);// set of data

4. Always selected item
Check the style of Show selection always, or in the section 2  above set LVS_SHOWSELALWAYS style.

5. Check and uncheck a row

int nIndex = 0;
// Check
m_list.SetItemState (nIndex, LVIS_SELECTED | LVIS_FOCUSED, LVIS_SELECTED | LVIS_FOCUSED);
// Uncheck
m_list.SetItemState (nIndex, 0, LVIS_SELECTED | LVIS_FOCUSED);

6. Get the checkbox status of all the rows

m_list.SetExtendedStyle(LVS_EX_CHECKBOXES);
CString str;
for(int i=0; i<nRowCount;i++)
{
   if( m_list.GetItemState(i, LVIS_SELECTED) == LVIS_SELECTED || m_list.GetCheck(i))
   {
        str.Format(_T(“checkbox checked in row %d”), i);
        AfxMessageBox(str);
   }
}

7. Get the selected row index

Method 1:

CString str;
for(int i=0; i<nRowCount;i++)
{
    if( m_list.GetItemState(i, LVIS_SELECTED) == LVIS_SELECTED )
    {
        str.Format(_T(“ROW %d selected.”), i);
        AfxMessageBox(str);
    }
}

Method 2:

POSITION pos = m_list.GetFirstSelectedItemPosition();
if (pos == NULL)
TRACE0(“No items were selected!\n”);
else
{
    while (pos)
    {
        int nItem = m_list.GetNextSelectedItem(pos);
        TRACE1(“Item %d was selected!\n”, nItem);
        // you could do your own processing on nItem here
    }
}

The simplest way to change the row height in a CListCtrl is:

Display an icon with the desired height.

All other ways that I know of require significant programming (such as owner draw, which is often too much work).

It’s a CListCtrl like control, but it binds a CTreeCtrl in the first column. But you can also consider it as a CTreeCtrl and each of the items has the list style.

All roads lead to Rome. But in 1999, David Lantsman has already given a solution on CodeProject and named it CTreeList: A TreeList Control.

You can Download demo project – 60 Kb and Download source files – 21 Kb from codeproject.

How to use an derived CListCtrl in CListView

First, when you add items, you need to call SetItemData to attach an data structure(an integer or a pointer) to the item.

Then, define a callback sort function.

int CALLBACK SortFunc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort);

And here, the prarameters lParam1 and lParam2 are the data structure you set in SetItemData. With the parameters, you can get the item content and calculate the sort order. Please notice, the parameters are NOT the item index.

Last, you can reponse the message HDN_ITEMCLICK or LVN_COLUMNCLICK, and call CListCtrl::SortItems with the callback function.

The examples from the CListCtrl::SortItems in MSDN is obsolescent, you’d better refer to the KB article:

250614 HOWTO: Sort Items in a CListCtrl in Report View

OK, you are on the wrong way now.

The CListView does not use or contain the MFC CListCtrl, it only wraps a subclassed SysListView32 control as a CCtrlView, in the other hand, the view is the control.

If all you’ve done in your custom CListCtrl derived class is to handle the reflected NM_CUSTOMDRAW message, your best bet to get this working as a custom CListView is to derive a class from CListView and handle the reflected message for it just as you do in your CListCtrl derived implementation.

If you want get  more custom control or you have already make an extended version of CList, It may be easier to derive a view class from CView and use your own CListCtrl in the view.

There are two articles about this topic on CodeGuru:

• http://www.codeguru.com/doc_view/custom_view.shtml
• http://www.codeguru.com/doc_view/Control2View.shtml

The following article from CodeProject provided a good solution.

• Changing Row Height in an owner drawn Control

And there is a similar article on CodeGuru.

• Changing row height in owner drawn control