For functions defined to return a known resource type a special local variable %return_res% is generated. This variables type is a pointer to the resources payload type and points to an allready allocated piece of memory of this type unless you specified %alloc="no"% in the %resource% tag. All you have to do is to take care of storing the appropriate payload data here. The actual resource registration and returning code will be generated for you. Resources will be covered in more detail later on.