This configuration variable is designed for Windows systems. It allows you to choose whether a transparent label placed within a frame appears according to the rules of Version 4.2.0 or according to those of Version 4.3.0. In Version 4.2.0, a transparent label placed inside a frame assumed the color of the frame background. In version 4.3.0, however, such a label assumed the color of the parent window. This variable allows you to choose between these two results. When V42_TRANSPARENT is set to "0" (off, false, no), then the Version 4.3.0 way of displaying the transparent style is used. When V42_TRANSPARENT is set to "1" (on, true, yes), then the Version 4.2.0 way of displaying the transparent style is used.