[SOLVED] How to check a range of cells is empty?

This checks if 3 cells of the range Target is empty.

If Len(Target.Cells(1, 1)) = 0 and Len(Target.Cells(1, 2)) = 0 and
Len(Target.Cells(1, 3)) = 0

How to write this with a single test expression?
I need this because i am gonna check it from column 1 to x, not column 1 to
3.