private bool txt_focus(TextBox[] arrTxt)
{
if (arrTxt != null)
{
int countTxt = arrTxt.Count();
for (int i = 0; i < countTxt; i++)
{
TextBox txt = arrTxt[i];
if (txt.Visible == true && txt.Enabled == true)
{
txt.Focus();
return true;
}
}
}
return false;
}