Crytal reports help required

Hai all,
The below block was taken from the help given in crystal reports
which comes with VB5. read it ,and give me a illustration for this.
Because i tried it doesn't work.
My prob is i want share the data between formulas ,
help me.

<blockquote>
How to declare a variable

You declare a variable at the beginning of the formula that uses the variable.

NOTE: You can not declare variables globally. If you are using a variable that was declared in another formula, you must declare it again.

NOTE: If you declare a variable with the same name and data type in two or more formulas, the formulas share the same variable. Thus, if one formula sets the value of the variable, the variable in the second (and additional formulas) reflects the change.
</blockquote>

Thank U All.

Bye.
So sadly.
Aniz.

If it's not letting you declare globally, could you create a Formula Field and put your data in that instead of a variable? You could then refer to that field in your calculations or whatever.