This variable applies only in a thin client environment. The TC_TV_SELCHANGING variable lets you control how often Msg-Tv-Selchanging events are generated in the thin client environment.
| Setting | Result |
| 0 | The Msg-Tv-Selchanging event is never generated. |
| 1 (the default) | A Msg-Tv-Selchanging event is generated only when a tree view selection is changed. |
| 3 | Msg-Tv-Selchanging is always generated. |
See Control Events in ACUCOBOL-GT User Inrterface Programming for more information on Msg-Tv-Selchanging.