Freigeben über

IServiceProviderImpl Class

  • Artikel

This class provides a default implementation of the IServiceProvider interface.

template < 
   class T 
>  
class ATL_NO_VTABLE IServiceProviderImpl : 
   public IServiceProvider

Parameters

  • T
    Your class, derived from IServiceProviderImpl.

Members

Public Methods

Name

Description

IServiceProviderImpl::QueryService

Creates or accesses the specified service and returns an interface pointer to the specified interface for the service.

Remarks

The IServiceProvider interface locates a service specified by its GUID and returns the interface pointer for the requested interface on the service. Class IServiceProviderImpl provides a default implementation of this interface.

IServiceProviderImpl specifies one method: QueryService, which creates or accesses the specified service and returns an interface pointer to the specified interface for the service.

IServiceProviderImpl uses a service map, starting with BEGIN_SERVICE_MAP and ending with END_SERVICE_MAP.

The service map contains two entries: SERVICE_ENTRY, which indicates a specified service id (SID) supported by the object, and SERVICE_ENTRY_CHAIN, which calls QueryService to chain to another object.

Inheritance Hierarchy

IServiceProvider

IServiceProviderImpl

Requirements

Header: atlcom.h

See Also

Other Resources

ATL Class Overview