private void frmWatershedCharacteristics_Load(object sender, EventArgs e)
        {
            if (currentCatchmentNum == 0)
            {
                currentCatchmentNum = 1;
            }

            cbPostLanduse.Items.Clear();

            cbPostLanduse.DataSource    = LanduseTable.Values();
            cbPostLanduse.DisplayMember = "D";
            cbPostLanduse.ValueMember   = "D";

            cbPreLanduse.DataSource    = LanduseTable.Values();
            cbPreLanduse.DisplayMember = "D";
            cbPostLanduse.ValueMember  = "D";

            this.Text += " Version: " + Application.ProductVersion;

            InterfaceCommon.BuildCatchmentMenu(menuStrip1, MenuItemClickHandler);

            menuStrip1.Items[1].BackColor = System.Drawing.Color.FromKnownColor(System.Drawing.KnownColor.MenuHighlight);
            menuStrip1.CanOverflow        = true;
            setValues();
        }
        private void getPandNValues()
        {
            string preLanduse = Common.getString(cbPreLanduse);
            double tPreN      = LanduseTable.getN(preLanduse);
            double tPreP      = LanduseTable.getP(preLanduse);

            string postLanduse = Common.getString(cbPostLanduse);
            double tPostN      = LanduseTable.getN(postLanduse);
            double tPostP      = LanduseTable.getP(postLanduse);

            if (!LanduseTable.isUserDefined(preLanduse))
            {
                Common.setValue(tbPreNConcentration, tPreN, 3);
            }
            if (!LanduseTable.isUserDefined(preLanduse))
            {
                Common.setValue(tbPrePConcentration, tPreP, 3);
            }

            if (!LanduseTable.isUserDefined(postLanduse))
            {
                Common.setValue(tbPostNConcentration, tPostN, 3);
            }
            if (!LanduseTable.isUserDefined(postLanduse))
            {
                Common.setValue(tbPostPConcentration, tPostP, 3);
            }

            if (LanduseTable.isUserDefined(preLanduse))
            {
                tbPreNConcentration.Enabled = true;
                tbPrePConcentration.Enabled = true;
                btnEMCPreN.Visible          = true;
                btnEMCPreP.Visible          = true;
            }
            else
            {
                tbPreNConcentration.Enabled = false;
                tbPrePConcentration.Enabled = false;
                btnEMCPreN.Visible          = false;
                btnEMCPreP.Visible          = false;
            }

            if (LanduseTable.isUserDefined(postLanduse))
            {
                tbPostNConcentration.Enabled = true;
                tbPostPConcentration.Enabled = true;
                btnEMCPostN.Visible          = true;
                btnEMCPostP.Visible          = true;
            }
            else
            {
                tbPostNConcentration.Enabled = false;
                tbPostPConcentration.Enabled = false;
                btnEMCPostN.Visible          = false;
                btnEMCPostP.Visible          = false;
            }
        }