#includeIn this example, we define a MyService class that inherits from DvProvider and implements a single action called "MyAction". This action takes an integer argument called "MyIntArg" and uses the InvocationReadInt method to read its value from the invocation message. The package library used in this example is likely to be the OpenHome library, which provides a framework for building UPnP devices and services in C++.#include using namespace OpenHome; using namespace OpenHome::Net; using namespace OpenHome::Net::Device; class MyService : public DvProvider { public: MyService(DvDevice& aDevice) : DvProvider("MyService", 1, aDevice) { EnableProperty("MyIntProperty"); EnableAction("MyAction", MakeFunctor(*this, &MyService::MyAction)); } private: void MyAction(IDviInvocation& aInvocation) { // read the integer argument from the invocation message TUint myInt; aInvocation.InvocationReadInt("MyIntArg", myInt); // do something with the integer value ... } }; int main() { // create a UPnP device and add a MyService instance to it DvDevice device(...); MyService service(device); // start the device and start handling incoming connections device.Start(); ... return 0; }