private void btnPlumSubAdd_Click(object sender, EventArgs e)
{
Form frmContractorAdd = new ContractorAdd();
frmContractorAdd.Show();
}
private void btnContractorAdd_Click(object sender, EventArgs e)
{
Form frmContractorAdd = new ContractorAdd();
cmboConstructionType.SelectedIndex = 0;
frmContractorAdd.Show();
}