Changing the tool tip as the mouse pointer moves along different tree control items is fairly simple. The tree control can be on a dialog, property page or a form view.
Assuming that you use a class derived from CFormView called CMyFormView, which has a tree control, the steps to follow are:
- Declare a member variable for the tree control (IDC_TREE1), m_tree.
- Decide on how the tip for each tree item will be stored. For instance, you could hold the tip in a map which you declare in the header file CMyFormView.h.
CMap< HTREEITEM,HTREEITEM&,CString,CString& > tooltipMap;
- Fill the map as you generate the items of the tree. For instance after every InsertItem:
HTREEITEM hItem = m_tree.InsertItem(&tvItem); // tvItem is of type TV_INSERTSTRUCT
tooltipMap[hItem] = ” Tool Tip Text “; // Set the tool tip text of the item.
- Declare an object of CToolTipCtrl in the header file CMyFormView .h
- Create the tool tip control and initialize it in the OnInitialUpdate message handler (OnInitDialog for CDialog derived classes)
m_tooltip.AddTool(GetDlgItem(IDC_TREE1), “Tree Tool Tip”);
- Override the PreTranslateMessage in the form view.
BOOL CMyFormView::PreTranslateMessage(MSG* pMsg)
// TODO: Add your specialized code here and/or call the base class
if(pMsg->message == WM_MOUSEMOVE && pMsg->hwnd == m_tree.m_hWnd)
HTREEITEM hItem = m_tree.HitTest(point);
if(hItem != NULL)
CString text = tooltipMap[hItem];
This changes the tool tip text as the mouse pointer moves along the different items in the tree control.