Tip of the day: Step for Textfield in Xojo
Me.ExecuteJavascript("document.getElementById('" + Me.ControlID + "_inner').step=10;")
Me.ExecuteJavascript("document.getElementById('" + Me.ControlID + "_inner').min=0;")
Me.ExecuteJavascript("document.getElementById('" + Me.ControlID + "_inner').max=100;")
Optionally we could make this one call to ExecuteJavascript, but for the client here, we subclass WebTextField, add properties for the inspector in the IDE to set them and then run those lines in the Shown event to pass to the browser if they are set.