No buffering.

Just try this in the command window:

create cursor test (name c(10))
append blank
Modi form xtest

Then drop a pageframe in the form and a textbox in the first page of the pageframe.
Put test.name as the controlsource of the textbox
Run the form.



Now, if you enter a value in the textbox and then click somewhere in the page and click again in the textbox: The value you entered disapears.

If you enter the value in the textbox then click in the form (outside the pageframe) and then click again in the textbox the value remains there.