CTreeCtrl

Hi,
I insert objects address as lParam in CTreeList and when I try to get it at OnDblclk.
by this code

NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;
TVITEMA* pItemNew = &pNMTreeView->itemNew;
CCityOb* pCity = (CCityOb*) pItemNew->lParam;

pCity don't return as vaild object, any one can help me
thanks.

I had the same problem.
This is a little tricky but works:


OnItemDoubleClick()
{
HTREEITEM item;
item = m_Tree.GetSelectedItem();

//...
}




This way you can know the item by text using


CString ItemText = m_Tree.GetItemText(item)




but i don't remember if the HTREEITEM structure allows you to get the index.

Hope it helps.

how do you poke the data in there?

When inserting the item in the control use this

CCityOb* pCity = new CCityOb;
//call any methods or initialize CCityOb
//and then
...->lParam = pCity;



where lParam is from the item u r inserting.