IPortableDeviceServiceMethodCallback interface (portabledeviceapi.h)

The IPortableDeviceServiceMethodCallback interface contains a method that applications use to track the completion of a callback method. Applications that call service methods asynchronously may implement this interface, and supply it as a parameter to IPortableDeviceServiceMethods::InvokeAsync.

Each asynchronous method invocation uses the application-supplied callback object as its context. Therefore, an application that intends to simultaneously invoke multiple methods should avoid reusing the callback object. Instead, the application should provide a unique instance of the callback object for each call to InvokeAsync

Inheritance

The IPortableDeviceServiceMethodCallback interface inherits from the IUnknown interface. IPortableDeviceServiceMethodCallback also has these types of members:

Methods

The IPortableDeviceServiceMethodCallback interface has these methods.

Requirements