Using vba to increment a variable

I have a variable that I need to increment. There are 4 of them, and I need to use them one at a time. I want to loop them, as well, so I can eliminate some lines of code. It works right now, but I am wondering if I can do this easier. Plus, if I need to do this again, I want to have a good reference.

The code right now looks like this:

dim Counter =1

do until Counter = 5

Value1 = txt1

call SubTest Value1

Counter = Counter +1

loop

So, can I use the counter as the number for the "txt" and have that increment properly when I loop, like this:

dim Counter =1

do until Counter = 5

Value1 = "txt & Counter"

call SubTest Value1

Counter = Counter +1

loop

Or am I giving myself a never-ending headache?

Thanks ahead of time!