validator controls & losing focus

[Guest]

I have several textboxes for entering data, and when the user enters a value
in one textbox, using the TextChanged event, the other textboxes are
calculated with various types of calculations.

The problem is if the user enters nonvalid data in the first textbox, the
validator callout or compare validator error only displays for a second
because the text changed event takes over so the error message disappears.

Any idea how I would get around that? Is there a dynamic way I could launch
the validator callout within the textchanged event?