private bool cbo_focus(ComboBox[] arrCbo)
{
if (arrCbo != null)
{
int countCbo = arrCbo.Count();
for (int i = 0; i < countCbo; i++)
{
ComboBox cbo = arrCbo[i];
if (cbo.Visible == true && cbo.Enabled)
{
cbo.Focus();
return true;
}
}
}
return false;
}