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private bool NMRCheckForEmptyFields()
        {
            bool r = true;
            if (comboBox_NMRNames.Text == "")
            {
                comboBox_NMRNames.BackColor = Color.Red;
                r = false;
            }
            else
            {
                comboBox_NMRNames.BackColor = Color.White;
            }

            if (numericUpDown_NMRQuantity.Value == 0)
            {
                numericUpDown_NMRQuantity.ForeColor = Color.Red;
                r = false;
            }
            else
            {
                numericUpDown_NMRQuantity.ForeColor = Color.Black;
            }
            
            if (textBox_NMRDescription.Text == "")
            {
                textBox_NMRDescription.BackColor = Color.Red;
                r = false;
            }
            else
                textBox_NMRDescription.BackColor = Color.White;

            return r;
        }