BCGSuite for MFC
void CBCGPBaseVisualCtrl::EnableTooltip ( BOOL  bEnable = TRUE,
BOOL  bTooltipTrackingMode = FALSE 

Enables tooltips

Use this function to activate or deactivate tooltip control. When tooltips are enabled the control processes the TTN_NEEDTEXT notification and calls OnGetToolTip() to obtain the tooltip text to be displayed.

bEnableIf TRUE tooltips will be enabled.
bTooltipTrackingModeTRUE to enable tooltip tracking mode, FALSE to disable it.