Genero Desktop Client front calls This section describes GDC-specific front calls. GDC Monitor Front CallsThis section describes front calls specific to the GDC monitor.Windows DDE SupportDescription of Windows® DDE support.Windows COM Support"COM" stands for Component Object Model. It allows anyone to directly access Windows™ Applications Objects. You can create instances of those objects, call methods on them, and get or set their properties.Windows Mail extensionDescription of the Windows® Mail extension.