thanks for reply. When I use WS 4.2 (mdb database) I can open this database via Microsoft Access at a time. It helps me check and edit if I want, don't need to exit WS. Example: In mdb database, if 2 or more components have a few same signatures of pins, I often use Microsoft Access to copy them. Its fast and better than scan again by WS. With hwdb database in WS4.3, I use VistaDB to open it but its opened in Exclusive mode (default mode - I think). so I cant open it with multi connection. I think if new WS4.3 can allow user open hwdb in Share mode is better. Or an option allows user choose Open mode ( Exclusive or share mode)