Drag and Drop with CListCtrl??

[Rajko]

Here is something I find unusual.

I implemented Drag and Drop to CListCtrl.
First I created my own class myCListCtrl from CListCtrl.
I implemented OnMouseMove and OnLButtonUp message handlers in class.

Unusual :
If I don't use RedrawWindow() I get trails from m_dragImage.
and second thing is
I don't need to use DragShowNolock( FALSE) and DragShowNolock( TRUE) to
update window. If I comment these two lines it will work fine.
Of course in parent class i called dragImage->DragEnter(&m_L ist,
pNMLV->ptAction);
Where m_List is member of CDialog class of type myCListCtrl.

Any comments are appreciated.

Thx, Rajko.

Here is my code:

void myListCtrl::OnM ouseMove(UINT nFlags, CPoint point) {
if (m_draging) {
LVHITTESTINFO lvHTI;
lvHTI.pt = point;
SubItemHitTest( &lvHTI);
if (lvHTI.flags & LVHT_ONITEMLABE L) {
if (m_posItemDrop != lvHTI.iItem) {
m_dragImage->DragShowNolock (FALSE);
// old item
SetItemState(m_ posItemDrop, 0, LVIS_DROPHILITE D);
m_posItemDrop = lvHTI.iItem;
// SetHotItem(m_po sItemDrop);
SetItemState(m_ posItemDrop, LVIS_DROPHILITE D,
LVIS_DROPHILITE D);
RedrawWindow();
// RedrawItems(0, GetItemCount()) ;
m_dragImage->DragShowNolock (TRUE);
//Update(lvHTI.iI tem);
}
}
// move image being dragged
m_dragImage->DragMove(point );
}
CListCtrl::OnMo useMove(nFlags, point);
}