Re: self-extending subfile and multiple selection?

Charles St-Laurent wrote:

Hi!

I read an article about self-extending subfile to navigate through data. The
technique looks quite simple. Each time the user press the PageDown key, or
the alternate key associated to the PageDown action, the program takes the
control and fills the next subfile page. But if the user press the PageUp
key, the system handles it.

There is limitations about this technique. The number of records the subfile
can contain is still limited to 9999. What if my file contains about 300 000
entries and a maniac user tries to scroll down to the end of the file?

In the other hand, if I use a subfile with SFLSIZ = SFLPAG, how can I trap
multiple selection in the subfile. I mean, what if the user selects a record
in one page, press the PageDown key, and selects another record in that
page? If I clear the subfile each time the user press the PageUp or PageDown
key, the READC won't see the selected records from the previous pages, only
the ones in the current page, isn't it?

What's bugging me is the limited size of a self-extending subfile and the
case of a multiple selection between pages. Is there a way to have a
self-extending subfile that can be greater than 9999 records and handles the
selection of multiple records through different pages?

Charles St-Laurent