iphone alert window

// open a dialog with just an OK button
UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Very Good!" delegate:nil cancelButtonTitle:nil destructiveButtonTitle:@"OK" otherButtonTitles:nil];

actionSheet.actionSheetStyle = UIActionSheetStyleDefault;
[actionSheet showInView:self.view];	
// show from our table view (pops up in the middle of the table)
[actionSheet release];