DesktopTextControl.ValidationFailed
From Xojo Documentation
Event
DesktopTextControl.ValidationFailed(InvalidText as String, StartPosition as Integer)
New in 2021r3
Supported for all project types and targets.
New in 2021r3
Supported for all project types and targets.
The user has tried to enter a character that is prohibited by the Mask property.
Notes
InvalidText is the entire character string up to and including the invalid text. StartPosition is the starting character position in which the actual invalid text was entered. The first character is numbered 1. If no code is provided in this event and a validation error occurs, you will hear the default system beep.