> In KeyPress event you can check SelStart property and if it equals to 0, you intercept the case and, I think, using setfocus() with nodefault will restore focus to the textbox.

actually after you trapped the backspace in the Keypress event (and confirmed it will get outof the field - either by if alltrim(this.value)="" or by what Edwards said or whatever) issueing a NODEFAULT will prevent the
Keypress from being processed

Arnon