private void newExpenseToolStripMenuItem_Click(object sender, EventArgs e)
 {
     if (ExpenseForm == null)
     {
         ExpenseForm = new frmExpense();
     }
     ExpenseForm.TopLevel = false;
     panelParent.Controls.Add(ExpenseForm);
     ExpenseForm.BringToFront();
     ExpenseForm.Show();
 }
        private void btnExpense_Click(object sender, EventArgs e)
        {
            frmExpense objExp = new frmExpense();

            ShowForm(objExp);
        }