TextEdit.AllowSpellChecking
From Xojo Documentation
Property (As Boolean )
aTextEdit.AllowCheckSpelling = newBooleanValue
or
BooleanValue = aTextEdit.AllowCheckSpelling
New in 2019r2
Supported for all project types and targets.
or
BooleanValue = aTextEdit.AllowCheckSpelling
New in 2019r2
Supported for all project types and targets.
If True, words that are believed to be misspelled are underlined.
Sample Code
This example is in the Initialized event of a TextArea: