Dev button 按钮更改颜色

        /// <summary>

        /// 按钮更改颜色

        /// </summary>

        /// <param name="col">颜色</param>

        /// <param name="btn">按钮</param>

        void setButtonBackColor(Color col, SimpleButton btn) {

          btn.LookAndFeel.Style = DevExpress.LookAndFeel.LookAndFeelStyle.UltraFlat;

          btn.LookAndFeel.UseDefaultLookAndFeel = false;

          btn.Appearance.BackColor = col;

          btn.Appearance.Options.UseBackColor = true;

        }