... Inherits QObject . ... Example: #include <qsignal.h> class MyClass { public: MyClass(); ~MyClass(); void doSomething(); void connect( QObject *receiver, const char *member ); private: QSignal *sig; }; MyClass::MyClass() { sig = new QSignal ; } MyClass::~MyClass() { delete sig; } void MyClass::doSomething() { // ... does something sig-> activate (); // activates the signal } void MyClass::connect( QObject *receiver, const char *member ) { sig-> connect ( receiver, member ); } . ... Emits the signal. ...