CMDITabInfo::m_bTabCustomTooltips
Specifies whether the tabs display tooltips.
BOOL m_bTabCustomTooltips;
Remarks
If TRUE, the application sends an AFX_WM_ON_GET_TAB_TOOLTIP message to the main frame. You can handle this message by using the ON_REGISTERED_MESSAGE macro.
Requirements
Header: afxmdiclientareawnd.h