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.