msgbox(select one of the open workbooks)

Hello Basimma

I will help you a little bit just for start.....

Here I created a Userform and a list box
The list box will display all open workbook as you said.
When you click a workbook from the list it will go there.
Hope this will help you.

But If you have already build some vba you better attach it so other members could work around it.