private void CreateSecondMark(int scrollBarWid)
 {
     int w = scrollBarWid - 1;
     int h = scrollBarWid - 2;
     UnsafeBitmap b = new UnsafeBitmap(w, h);
     b.LockBitmap();
     FormUtil.FillShadedRectangle(b, w, h);
     UnsafeBitmap bh = b.Lighter();
     UnsafeBitmap bp = b.Darker();
     b.UnlockBitmap();
     bh.UnlockBitmap();
     bp.UnlockBitmap();
     secondMark = b.Bitmap;
     secondMark.MakeTransparent();
     secondMarkHighlight = bh.Bitmap;
     secondMarkHighlight.MakeTransparent();
     secondMarkPress = bp.Bitmap;
     secondMarkPress.MakeTransparent();
 }
 private void CreateBar(int scrollBarWid, int width)
 {
     int w = CalcBarSize(width);
     int h = scrollBarWid - 2;
     UnsafeBitmap b = new UnsafeBitmap(w, h);
     b.LockBitmap();
     FormUtil.FillShadedRectangle(b, w, h);
     UnsafeBitmap bh = b.Lighter();
     UnsafeBitmap bp = b.Darker();
     b.UnlockBitmap();
     bh.UnlockBitmap();
     bp.UnlockBitmap();
     bar = b.Bitmap;
     bar.MakeTransparent();
     barHighlight = bh.Bitmap;
     barHighlight.MakeTransparent();
     barPress = bp.Bitmap;
     barPress.MakeTransparent();
 }