A summary of a couple of longer posts. Ralph Corderoy and I used different C syntax than to access an MxN array A, whose subscripts begin at M0 and N0 in the respective dimensions. Here's a somewhat simplified version of both. In our examples, M0 and M0 were negative. Mine: int base[M][N]; #define A(i,j) base[i-M0][j-N0] Ralph's int base[M][N]; int (*A)[N] = (int(*)[N])&base[-M0][-N0]; In my scheme element references must be written A(i,j). Ralph retains C array syntax, A[i][j]. Doug