private void button_EDIT_COUST_Click(object sender, EventArgs e)
 {
     if (this.gridView1.RowCount > 0)
     {
         string          ID_COUST   = gridView1.GetRowCellValue(gridView1.FocusedRowHandle, gridView1.Columns["ID_COUSTOMER"]).ToString();
         string          COUST_NAME = gridView1.GetRowCellValue(gridView1.FocusedRowHandle, gridView1.Columns["COUST_NAME"]).ToString();
         string          COUST_TEL  = gridView1.GetRowCellValue(gridView1.FocusedRowHandle, gridView1.Columns["TEL"]).ToString();
         string          COUST_ADD  = gridView1.GetRowCellValue(gridView1.FocusedRowHandle, gridView1.Columns["ADDRESS"]).ToString();
         string          COUST_TYPE = gridView1.GetRowCellValue(gridView1.FocusedRowHandle, gridView1.Columns["COUST_TYPE"]).ToString();
         FORM_COUSTOMERS FORM       = new FORM_COUSTOMERS();
         FORM.ID_COUST.Text            = ID_COUST;
         FORM.textBox_COUST_NAME.Text  = COUST_NAME;
         FORM.textBox_COUST_TEL.Text   = COUST_TEL;
         FORM.textBox_COUST_ADD.Text   = COUST_ADD;
         FORM.comboBox_COUST_TYPE.Text = COUST_TYPE;
         FORM.Text                      = "تحديث بيانات";
         FORM.groupBox1.Text            = "بيانات الزبون";
         FORM.button_ADD_NEW_COUST.Text = "تحديث";
         FORM.stat                      = "update";
         FORM.ShowDialog();
     }
 }
        private void button_ADDCOUST_Click(object sender, EventArgs e)
        {
            FORM_COUSTOMERS FORM = new FORM_COUSTOMERS();

            FORM.ShowDialog();
        }