Some resource notes:
http://www.codeproject.com/KB/wtl/CToolTipDialog.aspx

With an updated version here :
http://tech.groups.yahoo.com/group/wtl/files/atlTT.h

#include “atlTT.h” // or #include “ToolTipDialog.h”
class CMyDialog : public CDialogImpl, public
CToolTipDialog
CHAIN_MSG_MAP(CToolTipDialog)
and a string resource with your button ID.

Television – a medium. So called because it is neither rare nor well done.
-Ernie Kovacs

UIAddChildWindowContainer adds a window that is a container for child window to the UI Update list. It is needed so that child windows can be found from their container (parent) using their ID. For example, a dialog would be in this category.