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c645f9bcbe
Passing NULL or a blank string to SetToolTip(const char*) sets the tooltip to NULL by calling SetToolTip(BToolTip*) with a NULL argument. Calling SetToolTip(BToolTip*) with a NULL argument calls HideToolTip() because sometimes the tool tip can change without the mouse moving, for example because the user clicked. Thanks Axeld and Stippi.