Tooltip doesn't hide with the calendar

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   All you poor folks at CodeJock probably start crying when you see another post from me. The good news is that this is a piece of cake to fix, and I even posted the code for you.
If the calendar disappears, with a visible tooltip, the tooltip sticks around. This became an issue since our product can make the calendar hide without the user clicking, pressing a button, or anything else that would normally cause the tooltip to be dismissed.

The solution, if you didn't guess already, is to add a message handler for WM_SHOWWINDOW and hide the tooltip if the window hides.

In the header add:

   afx_msg void OnShowWindow(BOOL bShow, UINT nStatus);

In the cpp file add this to the message map...

   ON_WM_SHOWWINDOW()

...and this with the other message handlers.
void CPopoutCalendar::OnShowWindow(BOOL bShow, UINT nStatus)
{
   // hide the tooltip when we hide the window
   if (!bShow)
      HideToolTip();
   // call the base class
   CXTPCalendarControl::OnShowWindow(bShow, nStatus);
}