Jerry,

Sorry seemed to skip that snippet of information ;-) However, the whole issue of focus on webforms is quite the can of worms. There are a number of solutions available all with various issues associated with them, but one works pretty much all of the time (except for a curious bug when there is only one textbox on a form?).

private void Page_Load(object sender, System.EventArgs e) 
{ 
// This causes the page to associate Enter key with btnSearch click. 
Page.RegisterHiddenField( "__EVENTTARGET", "btnSearch" ); 
}