How can I define global variable in user exit whic I can use anywhere.

Hi all,

How can I define global variable( Table ) which I can use when it come back to same user exit where I defined and stored some data.

What I mean is I want to define 1 global table.

In user exit when it comes I store some information. and again when it will come I will have that stored information so I can use it.

Thanks a lot in advance.