include \masm32\include\masm32rt.inc
.code
rc RECT <12, 34, 56, 78>
start: mov esi, offset rc
_label: MyRc equ [esi.RECT] ; <<<<<<<<<<<<<<<<<<<<<
print str$(MyRc.left), 9, "left", 13, 10
print str$(MyRc.top), 9, "top", 13, 10
print str$(MyRc.right), 9, "right", 13, 10
print str$(MyRc.bottom), 9, "bottom", 13, 10
exit
end start