Avenue/DialogDesigner Q. - Checkboxs inside Listbox control ????

[eri...@isdn.net.il]

I have for some time used www.dbsp.com DevTools extension.
It has two command for exporting and importing scripts.
("Write Scripts to Disk" & "Read Scripts from Disk")
These commands open a Dialog that has a Listbox control
that has checboxes inside it for each row. With it you can
select/deselect which script you want or do not want to
write/read.

I wanted this kind of functionality for a dialog I'm creating,
but I couldn't find any documention on this feature of the
DialogDesigner extension. Does someone has an ideas how did
they (in DSPB) create this "effect" of Checboxes in Listbox?

Help will be really appriciated.

Thanks in advance
E.Rivlis