树控件背景加载一张图片//展开子项图片有变化是怎么回事?
ruti!!!!!!!!!!!!!!!!
[解决办法]
http://www.vckbase.com/index.php/wv/206.html

//处理tvn_itemexpanding
void CMyTreeCtrl::OnItemexpanding(NMHDR* pNMHDR, LRESULT* pResult) 
{
NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;
SetRedraw(FALSE);
*pResult = 0;
}

//处理tvn_itemexpanded
void CMyTreeCtrl::OnItemexpanded(NMHDR* pNMHDR, LRESULT* pResult) 
{
NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;
Invalidate();
SetRedraw(TRUE);
*pResult = 0;
}