private void btnMonth_Click(object sender, EventArgs e)
        {
            Form fc1 = Application.OpenForms["FORM_OS_DEFFECTIVE_STATUS_YEAR"];

            if (fc1 != null)
            {
                fc1.Show();
            }
            else
            {
                FORM_OS_DEFFECTIVE_STATUS_YEAR f1 = new FORM_OS_DEFFECTIVE_STATUS_YEAR();
                f1.Show();
            }
            this.Close();
        }
        void DWMYClick(string ButtonCap, string ButtonCD)
        {
            //MessageBox.Show(ButtonCap + "    " + ButtonCD);
            switch (ButtonCD)
            {
            case "C":
                this.Close();
                break;

            case "D":
                this.Close();
                Form fc = Application.OpenForms["FORM_OS_DEFFECTIVE_STATUS"];
                if (fc != null)
                {
                    fc.Show();
                }
                else
                {
                    FORM_OS_DEFFECTIVE_STATUS f = new FORM_OS_DEFFECTIVE_STATUS();
                    f.Show();
                }
                break;

            case "M":
                this.Close();
                Form fc1 = Application.OpenForms["FORM_OS_DEFFECTIVE_STATUS_YEAR"];
                if (fc1 != null)
                {
                    fc1.Show();
                }
                else
                {
                    FORM_OS_DEFFECTIVE_STATUS_YEAR f1 = new FORM_OS_DEFFECTIVE_STATUS_YEAR();
                    f1.Show();
                }
                break;
            }
        }