TComponent::QueryInterface - C++ Builder

C++ Builder 参考手册 ➙ TComponent ➙ QueryInterface


头文件:#include
命名空间:System::Classes
类:TComponent
访问权限:protected:
函数原型:

virtual HRESULT __stdcall QueryInterface(const GUID &IID, /* out */ void *Obj);

System::Classes::TComponent::QueryInterface 是 System::Classes::TComponent 的成员函数,返回当前组件所支持的 COM 接口的引用。

参数:

IID:接口类型的 GUID;
Obj:返回当前组件所支持的 COM 接口的引用到 Obj;

返回值:

S_OK:成功获取当前组件所支持的 COM 接口的引用到 Obj;
如果不支持,Obj 返回 NULL,函数返回值为 S_FALSE, E_NOINTERFACE, E_UNEXPECTED, 或 E_NOTIMPL 等。


参考:

  • System::Classes::TComponent::IsImplementorOf
  • System::Classes::TComponent::ReferenceInterface
  • System::Classes::TComponent::GetTypeInfo
  • System::Classes::TComponent::GetTypeInfoCount
  • System::Classes::TComponent::GetIDsOfNames
  • System::Classes::TComponent::Invoke
  • System::Classes::TComponent
  • System::Classes::TPersistent
  • System::TObject::GetInterface
  • System::TObject
  • VCL 类继承关系

C++ Builder 参考手册 ➙ TComponent ➙ QueryInterface

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