API ScriptRegion EnableMouseWheel

Sets whether the region should receive mouse wheel input.
 ScriptRegion:EnableMouseWheel([enable])
==Arguments==
:;enable:
==Example==
local f = CreateFrame("Frame", nil, nil, "BackdropTemplate")
f:SetSize(200, 200)
f:SetPoint("CENTER")
f:SetBackdrop(BACKDROP_TUTORIAL_16_16)
f:SetScript("OnMouseWheel", function(self, delta)
	print("OnMouseWheel", delta)
end)
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==Details==
Setting the OnMouseWheel script automatically implies EnableMouseWheel(true)
local f = CreateFrame("Frame")
print(f:IsMouseWheelEnabled()) -- false
f:SetScript("OnMouseWheel", function() end)
print(f:IsMouseWheelEnabled()) -- true