Chapter 14 Quick Reference

To	Do this
Define a delegate.	Use the __delegate keyword with a function prototype. For example: __delegate void DelegateOne(double d);
Create a delegate bound to a static class member.	Use new to create a Delegate object, passing 0 for the first parameter and the address of the static function as the second parameter. For example: DelegateOne* pDel = new DelegateOne(0, &MyClass::MyFunc);
Create a delegate bound to a non-static class member.	Use new to create a Delegate object, passing a pointer to the instance for the first parameter and the address of the member function as the second parameter. For example: DelegateOne* pDel = new DelegateOne( pMyObject, &MyClass::MyOtherFunc);
Execute the function bound to a delegate.	Use the delegate’s Invoke function, passing any parameters required. For example: pDel->Invoke(22.7);
Create an event.	First define a delegate to define the handler routine for this event, as follows: __delegate void ClickHandler(int, int); Then, in the event source class, use the __event keyword to define an event object, like this: __event ClickHandler* OnClick;
Raise an event.	Use the event object as if it were a function, passing any parameters. For example: OnClick(xVal, yVal);
Subscribe to an event.	Use the += operator. For example: mySrc->OnClick += new ClickHandler(this, &myHandler);
Unsubscribe from an event.	Use the -= operator. For example: mySrc->OnClick -= new ClickHandler(this, &myHandler);