private void Start_btn_Click(object sender, EventArgs e)
{
if (FLSM_chck.Checked)
{
FLSM_Mass.Show();
FLSM_Mass.Enabled = true;
VLSM_Mass.Hide();
}
else if (VLSM_chck.Checked)
{
VLSM_Mass.Show();
VLSM_Mass.Enabled = true;
FLSM_Mass.Hide();
}
else
{
return;
}
IP_txt.Enabled = true;
Calc_btn.Enabled = true;
Req_txt.Enabled = true;
}
private void VLSM_Mass_Leave(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(VLSM_Mass.Text) == true)
{
VLSM_Mass.Focus();
errorProvider2.SetError(this.VLSM_Mass, "Please enter Subnet mask!");
}
else
{
errorProvider2.Clear();
}
}
