WebRadioButton.Caption
From Xojo Documentation
Property (As String )
aWebRadioButton.Caption = newStringValue
or
StringValue = aWebRadioButton.Caption
New in 2020r1
Supported for all project types and targets.
or
StringValue = aWebRadioButton.Caption
New in 2020r1
Supported for all project types and targets.
The text that appears next to the button.