MFC: Create tooltip for a Tab in CTabView - c++

Question

I want to create a ToolTip for a tab on a CTabView which is in one of the CSplitterWnd panes. In this case the tab is a CHtmlView. I put the CToolTipCtrl m_ToolTip in the CMainFrame as public. I create it on OnCreate(), then attempt to add test text to it on OnInitialUpdate() of the CHtmlView tab item. But when hovering over the tab or client area of the tab, no tool tip shows. What am I doing wrong or missing?
int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
// ...
m_ToolTip.Create(this);
return 0;
}
BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext)
{
// create spliter windows - one of which will end up with CTabView
}
// One of the tabs in the CTabView is based on CHtmlView
void CMyHtmlView::OnInitialUpdate()
{
__super::OnInitialUpdate();
CToolTipCtrl &tooltip=((CMainFrame*) AfxGetMainWnd())->m_ToolTip;
tooltip.AddTool(this, _T("Test Tooltip"));
tooltip.Activate(TRUE);
}
Abandoning the above, I implemented the suggestion on page 941-942 in the book Programming Windows with MFC second Edition to derive from CToolTipCtrl and implement new functions that use TTF_SUBCLASS. I tried it with in the CMyTabView on the client area of the tabs. It sort of works with the Edit and Rich Views but not HTML view. By sort of, I mean, it works maybe twice then doesn't come up again. Here's that part:
int CMyTabView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CTabView::OnCreate(lpCreateStruct) == -1)
return -1;
AddView(RUNTIME_CLASS(CMyEditView), _T("Tab1"));
AddView(RUNTIME_CLASS(CMyRichView), _T("Tab2"));
AddView(RUNTIME_CLASS(CMyHtmlView), _T("Tab3"));
m_ToolTip.Create(this, TTS_ALWAYSTIP);
CMFCTabCtrl &tabctrl=GetTabControl();
for (int i=0; i < tabctrl.GetTabsNum(); ++i) {
m_ToolTip.AddWindowTool(tabctrl.GetTabWnd(i), _T("Test Tool Tip"));
}
return 0;
}
Not working on the HTML View was fine because I really just want it on the tab. So I change it up and got rid of the stuff above (except the .Create) and added:
void CMyTabView::OnInitialUpdate()
{
CTabView::OnInitialUpdate();
CMFCTabCtrl &tabctrl=GetTabControl();
CRect rc;
tabctrl.GetTabsRect(rc);
if (!rc.IsRectEmpty()) {
m_ToolTip.AddRectTool(&tabctrl, _T("test tip"), &rc, (UINT_PTR) tabctrl.GetSafeHwnd());
}
}
But that doesn't work. It tried using this as well, still didn't work. So while something worked, still can't get it to work on the tabs? Any ideas?