private void btnBack_Click(object sender, EventArgs e)
        {
            frmInput fInputF = new frmInput();//Open frmInput form

            fInputF.ShowDialog();
        }
        private void btnMenu_Click(object sender, EventArgs e)
        {
            frmInput frm2 = new frmInput();

            frm2.ShowDialog();
        }
        private void btnInputForm_Click(object sender, EventArgs e)
        {
            frmInput frm1 = new frmInput();

            frm1.ShowDialog();
        }