TComponent::_AddRef - C++ Builder

C++ Builder 参考手册 ➙ TComponent ➙ _AddRef

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

int __stdcall _AddRef(void);

System::Classes::TComponent::_AddRef 是 System::Classes::TComponent 的成员函数，调用 COM 接口的 _AddRef 增加引用计数。

参数：
无

返回值：
如果组件封装的是 COM 接口，会调用 COM 接口的 _AddRef 增加引用计数，返回值为当前的引用计数值；如果封装的不是 COM 接口，直接返回 -1。

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参考：

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

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C++ Builder 参考手册 ➙ TComponent ➙ _AddRef