Macro Question

Hi, its me again.

I have a macro that saves, and closes a worksheet after it has been inactive for 15 minutes. I have come across a problem when users leave this worksheet open minimized, and have another open, the macro will save and close the active workbook (which it is supposed to do with activeworkbook.save and .close in the code of the first workbook). Im trying to find a way around this. Is there a way to specify, instead of activeworkbook.close, the workbook the code is being run from? then it wouldnt effect other worksheets open, only the one running the code?

Thanks