may wish to do some cleaning up operations in this function, {\it if} a
call to wxDocument::Close succeeded. For example, if your application's
all share the same window, you need to disassociate the window from the view
may wish to do some cleaning up operations in this function, {\it if} a
call to wxDocument::Close succeeded. For example, if your application's
all share the same window, you need to disassociate the window from the view