Excel Macro - isOpen function?

[shinkley]

I have a macro that imports a file. I wish to code the following logic, how would I go about doing it?

If (blank workbook is open)
insert into blank workbook
else
new workbook

I can use the workbooks.add stmt to always open a new workbook, but i would prefer to import into workbook if it's open (only if there is no data in it).

thanks in advance.