[python-win32] ActiveSheets and excel

[Graeme Glass]

When dispatching your own instance of excel, it is pretty straight
forward to access the workbook and ActiveSheets by way of the 
Excel.Application object, in this case exapp.
eg:

exapp = win32com.client.Dispatch("Excel.Application")
        exapp.Visible = 1
        exapp.Workbooks.Add()
        exapp.ActiveSheet.Cells(1,1).Value = 'hello'

my question is, how does one add, remove workbooks, and access
ActiveSheets from with excel by means of an Addin? I have been
attempting to access it throught what i thought was the application
interface in the plugin but it is not :-)
So i currently stand with a plugin button that can bring up message
boxes and frames but not do anything really usefull. Any help would be
very much appreciated.

Thanks, Graeme