GDDINITOUT Field - cFunctionClasses

 cFunctionClasses (ULONG) 
    Number of function classes supported. 

    In most cases, this value will be equal to one (1). A GRADD can, 
    however, return a zero (0). This is typically done by filter GRADDs 
    that do not want to be entered in the CHAININFO/GRADDINFO information 
    returned to the translation layer via the VMI_CMD_QUERYCHAININFO 
    function. A GRADD can include built-in extensions by returning a value 
    greater than one (1).