If you mean a text tooltip it should work the same as with the checkbox.
Use the OnMouseEnter handler to show, and OnMouseExit handler to hide the text tooltip.
Something like that:
myControl is your label control.
e.g. set the tooltip text to the label itseelf before
myControl.tooltipText = "Test tooltip text"
Lua Code:
myControl:SetHandler("OnMouseEnter", function(self)
ZO_Tooltips_ShowTextTooltip(self, BOTTOM, self.tooltipText)
end)
myControl:SetHandler("OnMouseExit", function(self)
ZO_Tooltips_HideTextTooltip()
end)