WoW:API Region SetAllPoints

Equivalent to:

frame:SetPoint("TOPLEFT",parentFrameName,"TOPLEFT",0,0)
frame:SetPoint("TOPRIGHT",parentFrameName,"TOPRIGHT",0,0)
frame:SetPoint("BOTTOMLEFT",parentFrameName,"BOTTOMLEFT",0,0)
frame:SetPoint("BOTTOMRIGHT",parentFrameName,"BOTTOMRIGHT",0,0)

Template:WoW API