WebControlWrapper.ControlAvailableInBrowser
From Xojo Documentation
Method
WebControlWrapper.ControlAvailableInBrowser() As Boolean
New in 2012r2
Supported for all project types and targets.
New in 2012r2
Supported for all project types and targets.
Returns True if the control has been created in the user's browser. Once this method starts returning True you can start sending commands directly to your control through the WebControl.ExecuteJavaScript method.