Active Range

hello,

does anyone know how in Excel VBA to make a certain range active, without seeing Excel jumping to that cell? basically i need a macro that activates a certain range, performs a routine on it, and then activates the cell that was active before the macro was executed. when i use Range("Whatever").Activate i can actually see Excel jumping to the activated cells, performing a routine, and jumping back. is there a way for me not to see all those intermediate jumps?

there are no workarounds here because the subroutine i need to perform runs only on active cells. it is actually a macro/program purchased from a commercial company and i certainly can't modify its code.

THANKS!!!