I create an array in my init procedure

dimension a__gen10(1,2)

as soon as I leave init procedure and go grids interactivechange() procedure to populate the grid the array definition disappears.
Is there a way to make array through all the procedure for a form like a variable? I am trying to populate the array in grid by increasing array size and inserting values as follows

*.grid.column1.text1.interactivechange()
with thisform
if .first_sw = .f.
.first_sw = .t.
.v = .v + 1
a__gen10(.v,1) = .g1.c1.t1.value
a__gen10(.v,2) = .g1.c6.t6.value
else
dimension a__gen10(alen(a__gen10, 1) + 1, alen(a__gen10, 2)) .v = .v + 1
a__gen10(.v,1) = .g1.c1.t1.value
a__gen10(.v,2) = .g1.c1.t1.value
endif
endwith

Thanks
Nick Patel