Controls the color of the grid in the area past the end of the last column or the end of the last row. In some cases, a blank area is visible. If this property is set to zero (the default), this area is filled with the button face color configured for the host machine (this is set in the Control Panel under Windows). If set to a non-zero value, this value represents the exact ACUCOBOL-GT color to use. These values range from 1 (black) to 16 (bright white).