check cells before division by zero

[isnoend07]

I want to make sure of no divison by zero error messages
I am doing division on a mshflexgrid like this:
with grid
.textmatrix(2, 12) = .textmatrix(2, 11) / .textmatrix(2, 9)
some of the cells maybe empty and some maybe formated as currency with a dollar sign
is this the best method:

If val(.textmatrix(2, 11) <> 0 then
      If val(.textmatrix(2, 9) <> 0 then
             .textmatrix(2, 12) = .textmatrix(2, 11) / .textmatrix(2, 9)
      else
             textmatrix(2, 12) = ""
      end if
end if

would this code be appropriate?