Unicode tooltips not showing up.

Question

Hi, I am trying to display unicode tooltips in my application window, however they do not seem to display. Non-unicode text shows up correctly but as soon as I try doing unicode no tooltip shows up. The following is what I am currently doing, any help is appreciated thank you.

     HWND parentHwnd = pickInfo->getViewer().getCachedHwnd();
  CWnd *pWnd = CWnd::FromHandlePermanent(parentHwnd);
  HINSTANCE hInstance = GetModuleHandle(NULL);

  if (isUnicode)
   m_toolInfoW.lpszText = L"This tooltip does not show up at all.";
  else
   m_toolInfoA.lpszText = "Non unicode text";

  if (!m_bTooltipInitialized){
   ::SendMessage(m_tooltipHwnd, WM_DESTROY, 0,0);

   if(isUnicode)
    m_tooltipHwnd = CreateWindowExW(WS_EX_TOPMOST,
     TOOLTIPS_CLASSW, NULL,
     WS_POPUP | TTS_NOPREFIX | TTS_ALWAYSTIP,  
     CW_USEDEFAULT, CW_USEDEFAULT,
     CW_USEDEFAULT, CW_USEDEFAULT,
     parentHwnd, NULL, hInstance, NULL);
   else 
    m_tooltipHwnd = CreateWindowEx(WS_EX_TOPMOST,
     TOOLTIPS_CLASS, NULL,
     WS_POPUP | TTS_NOPREFIX | TTS_ALWAYSTIP,  
     CW_USEDEFAULT, CW_USEDEFAULT,
     CW_USEDEFAULT, CW_USEDEFAULT,
     parentHwnd, NULL, hInstance, NULL);

   if (GetLastError() != 0)
    return;

   ::SetWindowPos(m_tooltipHwnd, HWND_TOPMOST,
    0, 0, 0, 0,
    SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);

   // Set the max text width before multi-line tooltip is used.
   ::SendMessage(m_tooltipHwnd, TTM_SETMAXTIPWIDTH, 0, m_nMaxWinTooltipWidth);

   if (isUnicode){
    m_toolInfoW.uFlags = TTF_SUBCLASS | TTF_IDISHWND | TTF_TRACK;
    m_toolInfoW.hinst = hInstance;
    m_toolInfoW.hwnd = parentHwnd;
    m_toolInfoW.uId = (UINT_PTR)parentHwnd;
    ::GetClientRect (parentHwnd, &m_toolInfoW.rect);

    ::SendMessage(m_tooltipHwnd, TTM_ADDTOOLW, 0, (LPARAM) (LPTOOLINFOW) &m_toolInfoW);
    ::SendMessage(m_tooltipHwnd, TTM_ACTIVATE, TRUE, (LPARAM)(LPTOOLINFOW) &m_toolInfoW);
   }
   else{
    m_toolInfoA.uFlags = TTF_SUBCLASS | TTF_IDISHWND;
    m_toolInfoA.hinst = hInstance;
    m_toolInfoA.hwnd = parentHwnd;
    m_toolInfoA.uId = (UINT_PTR)parentHwnd;
    ::GetClientRect (parentHwnd, &m_toolInfoA.rect);

    ::SendMessage(m_tooltipHwnd, TTM_ADDTOOL, 0, (LPARAM) (LPTOOLINFO) &m_toolInfoA);
    ::SendMessage(m_tooltipHwnd, TTM_ACTIVATE, TRUE, (LPARAM)(LPTOOLINFO) &m_toolInfoA);
   }
   m_bTooltipInitialized = true;
  }

  if (isUnicode)
   ::SendMessage(m_tooltipHwnd, TTM_UPDATETIPTEXTW, 0, (LPARAM) (LPTOOLINFOW) &m_toolInfoW);
  else
   ::SendMessage(m_tooltipHwnd, TTM_UPDATETIPTEXT, 0, (LPARAM) (LPTOOLINFO) &m_toolInfoA);

  //Repaint the screen so that the area beneath the previous location of the tooltip is restored correctly.
  ::UpdateWindow(pWnd->GetParentOwner()->GetSafeHwnd());
  pWnd = NULL;

Answer 1

In the Unicode case you have TTF_TRACK, which I believe requires you to manually show or hide the tooltip. In the ANSI case, you don't have that option.

http://msdn.microsoft.com/en-us/library/bb760252(VS.85).aspx

Scroll down to "Implementing Tracking Tooltips".