MobileTextField.Password
From Xojo Documentation
Property (As Boolean )
aMobileTextField.Password = newBooleanValue
or
BooleanValue = aMobileTextField.Password
New in 2020r2
Supported for all project types and targets.
or
BooleanValue = aMobileTextField.Password
New in 2020r2
Supported for all project types and targets.
If True, each character will be masked as it's entered.