/// <summary>
        /// Set default values of column tab
        /// </summary>
        private void InitializeColumnTab()
        {
            columnFkNameTextBox.BackColor        = Color.Gray;
            columnFkNameTextBox.ReadOnly         = true;
            columnIndexNameTextBox.BackColor     = Color.Gray;
            columnIndexNameTextBox.ReadOnly      = true;
            columnRefSchemaNameTextBox.BackColor = Color.Gray;
            columnRefSchemaNameTextBox.ReadOnly  = true;
            columnRefTableNameTextBox.BackColor  = Color.Gray;
            columnRefTableNameTextBox.ReadOnly   = true;
            columnRefColumnNameTextBox.BackColor = Color.Gray;
            columnRefColumnNameTextBox.ReadOnly  = true;

            this.columnTypeComboBox.DataSource    = DataTypeDropDown.GetAllDropDownOptions();
            this.columnTypeComboBox.DisplayMember = "Value";
            this.columnTypeComboBox.ValueMember   = "Key";

            this.columnTypeComboBox.DropDownStyle = ComboBoxStyle.DropDownList;
        }
        //Init table creation tab default values
        private void InitializeTableTab()
        {
            ((DataGridViewComboBoxColumn)tableColumnsGrid.Columns[tableCellKeyType]).DataSource    = DataTypeDropDown.GetAllDropDownOptions();
            ((DataGridViewComboBoxColumn)tableColumnsGrid.Columns[tableCellKeyType]).DisplayMember = "Value";
            ((DataGridViewComboBoxColumn)tableColumnsGrid.Columns[tableCellKeyType]).ValueMember   = "Key";
            tableColumnsGrid.Columns[tableCellKeyType].ValueType = typeof(DataType);

            tableColumnsGrid.Rows.Add(true,
                                      "ID",
                                      DataType.Number,
                                      null,
                                      null,
                                      false,
                                      "Identificator",
                                      false,
                                      null,
                                      false,
                                      null,
                                      null,
                                      null,
                                      null,
                                      null);
            tableColumnsGrid.Rows[0].ReadOnly = true;
            tableColumnsGrid.Columns[tableCellKeyIsPrimaryKey].DefaultCellStyle.BackColor = Color.Gray;
            tableColumnsGrid.Rows[0].DefaultCellStyle.BackColor = Color.Gray;
        }