e> is a C++ pure virtual class that declares all methods required by the GGR objects to communicate their graphical operations. Implementations of <code>VGDevices</code> are provided by clients applications using derived classes so that neither GGR objects nor any part of the GUIDO Engine depends on a particular graphical implementation.</p>
<p>The main advantage is that <code><a class="el" href="classVGDevice.html" title="Generic platform independant drawing device.">VGDevice</a></code> derived classes can