i want prevent double clicked event at tree control in MFC? - mfc

Question

i have implemented multi selection when LButtonDown from tree control in MFC
but when i do fast click repeatedly Mouse LButtonDown then a problem arises.
i thinks this problem is occoured by double clicked event when i clicked fast
repeadtly.
i want to acquired click event only except double clickevent.
importance is must be solved this problem in only LBUTTONDOWN event and LButtonClick event.
please help me. ~
my english writing is so badddest. sorry.
below is my source's part.
void CFileTreeCtrl::OnLButtonDown(UINT nFlags , CPoint point)
{
//LRESULT *pResult = 0;
GetCursorPos(&point);
::ScreenToClient(this->m_hWnd, &point);
HTREEITEM hItem = this->HitTest(point, &nFlags);
// if items is exist and event is occured
if (hItem != NULL && (nFlags & TVHT_ONITEMSTATEICON) != 0)
{
// if items is checked
if (this->GetCheck(hItem))
{
UnCheckChildItems(hItem);
}
// items is not checked
else
{
CheckChildItems(hItem);
}
}
CDragDropTreeCtrl::OnLButtonDown(nFlags, point);
}
//=========================================================
// checked all child items
//=========================================================
void CFileTreeCtrl::CheckChildItems(HTREEITEM hItem)
{
HTREEITEM hChildItem = this->GetChildItem(hItem);
while (hChildItem != NULL)
{
this->SetCheck(hChildItem, TRUE);
if (this->ItemHasChildren(hChildItem))
{
CheckChildItems(hChildItem);
}
hChildItem = this->GetNextItem(hChildItem, TVGN_NEXT);
}
}
//=========================================================
// Uncheck all child items.
//=========================================================
void CFileTreeCtrl::UnCheckChildItems(HTREEITEM hItem)
{
HTREEITEM hChildItem = this->GetChildItem(hItem);
while (hChildItem != NULL)
{
this->SetCheck(hChildItem, FALSE);
if (this->ItemHasChildren(hChildItem))
{
UnCheckChildItems(hChildItem);
}
hChildItem = this->GetNextItem(hChildItem, TVGN_NEXT);
}
}