I want to use BindEvent() to refresh one textbox when another textbox on the form is changed. Shouldn't this work?

BindEvent(Thisform.TextBox1,"InteractiveChange",Thisform.TextBox2,"Refresh")

BindEvent() works if I bind to a form-level event, such as:

BindEvent(Thisform,"Resize",Thisform.TextBox2,"Refresh")

... but it doesn't appear to work if I bind to a control on the form. Am I doing something wrong, or is this a bug?

Thanks.