Release 10.1A: OpenEdge Development:
ADM Reference

DataModified

Indicates whether the current SCREEN-VALUES have been modified but not saved.

Data type: LOGICAL

Notes:

Read and Write.
When DataModified is set to TRUE, the check occurs before any other code is executed.
Disables searching while there is an update in progress in the SmartDataBrowser. SmartDataBrowser version of setDataModified.