string data type max size problem

[Lior]

Guys,
If i wanna set A to be of the data type of String,
But I want it to be able to get max characters number of 8

How do I do this?
I tried this code:

 
Dim A as String *8

But when I do A="XX" so A actually gets "XX " instead of just "XX"

Could you help me, please?