When I put

if This.SelectOnEntry
  dodefault()
  nodefault
endif

in the textbox’s gotfocus() event, the control would no longer get focus … even if I tried to tab into it. However, there was another bit of code in the thread from Borislav Borissov as follows:

if this.SelectOnEntry
  nodefault
  TextBox::GotFocus()
endif

… and it worked as I was asking for, with a click on the textbox bringing exactly the same response as tabing into it.

Bob