>>I am curious, how it may work, as you said "If I tab into the control, then everything is selected."
>>As far as I understand, SelStart, it is for USER input; and user input does not include left parenthesis.
>>Do you have anything for textbox.format there?
>
>I agree that the user input does not include the left parenthesis because that's just part of the mask. However, if the textbox receives focus from hitting the Tab key, the left paren is included in the selection.

This is why I am curious: no matter what I do, left parenthesis is NOT included. Could you send to me an example that would allow me to reproduce the behavior?