DevExpress.XtraBars.BarEditItem = (Bitmap)DevExpress.Utils.Controls.ImageHelper.CreateImageFromResources("RibbonSimplePad.online.gif", typeof(frmMain).Assembly);

changes

DevExpress.XtraBars.BarEditItem = (Bitmap)DevExpress.Utils.Controls.ImageHelper.CreateImageFromResources("Red.gif", typeof(frmMain).Assembly);