Right now my code is set up to run a Do/Loop until all iterations are
completed, then execute more code.  I have realized that if the number
of iterations is very large, I will need to break things up into
smaller chunks.  If the total iteratins is 100, for instance, I wiil
need to run the loop 20 times, execute the code, loop 20 more,
execute, etc etc.  For some reason, I can't seem to get my brain
moving on this.  A drop-kick in the right direction would be
appreciated.

I currently have:

y = Total_Iterations
x = 1

Do
 ' Some_code
 x = x + 1
Loop Until x = y

' Execute_this

I need to change to:

y = Total_Iterations
x = 1

If y > 20

Do
 ' Some_code
 x = x + 1
Loop Until x = 20

' Execute_this

' Go back for 20 more and execute again
' until y has been reached.

Ed