Sets tooltip as the contents of the tooltip for the icon at the specified position. Use NULL for tooltip to remove an existing tooltip. See also gtk_widget_set_tooltip_text() and gtk_entry_set_icon_tooltip_markup(). Since 2.16
the icon position
the contents of the tooltip for the icon, or NULL. [allow-none]
See Implementation
Sets tooltip as the contents of the tooltip for the icon at the specified position. Use NULL for tooltip to remove an existing tooltip. See also gtk_widget_set_tooltip_text() and gtk_entry_set_icon_tooltip_markup(). Since 2.16