//=====================================================================
        // Custom Form Business Logic
        //=====================================================================
        private void buttonSubmitTransaction_Click(object sender, EventArgs e)
        {
            if (verifyTextboxes())
            {
                int    account_number = Convert.ToInt32(textBoxAccountNumber.Text);
                double amount_value   = Convert.ToDouble(textBoxAmount.Text);
                double amount_changed = (comboBoxDebitCredit.Text == "Credit") ? amount_value : 0 - amount_value;

                databaseService.AddAccountTransaction(account_number, amount_changed);

                WindowManager.navigateToForm(this, this.GetType(), typeof(Homescreen));
            }
            else
            {
                MessageBox.Show("Invalid Transaction Info Provided: Account Number must be an integer.  Combobox must have length < 8.  Amount changed should be a decimal.");
            }
        }