private void GenerateButtonImages()
        {
            Color grayColor = SystemColors.ControlDark;

            this.highContrastMode = SystemInformation.HighContrast;

            if (this.highContrastMode)
            {
                grayColor = SystemColors.Control;
            }

            this.moveUpImage       = XHelperMethods.MapBitmapColor(this.moveUpOriginalImage, Color.Black, SystemColors.ControlText);
            this.moveUpGrayImage   = XHelperMethods.MapBitmapColor(this.moveUpOriginalImage, Color.Black, grayColor);
            this.moveDownImage     = XHelperMethods.MapBitmapColor(this.moveDownOriginalImage, Color.Black, SystemColors.ControlText);
            this.moveDownGrayImage = XHelperMethods.MapBitmapColor(this.moveDownOriginalImage, Color.Black, grayColor);
            this.deleteImage       = XHelperMethods.MapBitmapColor(this.deleteOriginalImage, Color.Black, SystemColors.ControlText);
            this.deleteGrayImage   = XHelperMethods.MapBitmapColor(this.deleteOriginalImage, Color.Black, grayColor);
        }