CButton Tooltips dont popup intermittently

[Anarchi]

VS2005 C++ (v8.0.50727.867), WinXP SP2

I have a standard MFC CDialog with some CButtons. The CButtons are using CToolTipCtrl to display a popup tooltip box.

When my Program starts up, all the tooltips work fine.

When I click a Button, the Tooltip never pops up anymore.


Is there bug in CToolTipCtrl?

This happens in two of my MFC programs that use CToolTips differently. One of the programs is using the CButtonST class by Davide Calabro, the other Program is using the ToolTipButton class made by ?? (downloaded from codeguru or Codeproject) which is basically a class that adds tooltips to CButton.
It happens with Static buttons, and buttons created on the fly.


Here is the code from BtnST.cpp

void CButtonST::InitToolTip()
{
	if (m_ToolTip.m_hWnd == NULL)
	{
		// Create ToolTip control
		m_ToolTip.Create(this, m_dwToolTipStyle);
		// Create inactive
		m_ToolTip.Activate(FALSE);
		// Enable multiline
		m_ToolTip.SendMessage(TTM_SETMAXTIPWIDTH, 0, 400);
		//m_ToolTip.SendMessage(TTM_SETTITLE, TTI_INFO, (LPARAM)_T("Title"));
	} // if
}

void CButtonST::SetTooltipText(int nText, BOOL bActivate)
{
	CString sText;

	// Load string resource
	sText.LoadString(nText);
	// If string resource is not empty
	if (sText.IsEmpty() == FALSE) SetTooltipText((LPCTSTR)sText, bActivate);
}

void CButtonST::SetTooltipText(LPCTSTR lpszText, BOOL bActivate)
{
	// We cannot accept NULL pointer
	if (lpszText == NULL) return;

	// Initialize ToolTip
	InitToolTip();

	// If there is no tooltip defined then add it
	if (m_ToolTip.GetToolCount() == 0)
	{
		CRect rectBtn; 
		GetClientRect(rectBtn);
		m_ToolTip.AddTool(this, lpszText, rectBtn, 1);
	} // if

	// Set text for tooltip
	m_ToolTip.UpdateTipText(lpszText, this, 1);
	m_ToolTip.Activate(bActivate);
}

void CButtonST::ActivateTooltip(BOOL bActivate)
{
	// If there is no tooltip then do nothing
	if (m_ToolTip.GetToolCount() == 0) return;

	// Activate tooltip
	m_ToolTip.Activate(bActivate);
}

BOOL CButtonST::PreTranslateMessage(MSG* pMsg) 
{
	InitToolTip();
	m_ToolTip.RelayEvent(pMsg);
	
	if (pMsg->message == WM_LBUTTONDBLCLK)
		pMsg->message = WM_LBUTTONDOWN;

	return CButton::PreTranslateMessage(pMsg);
}