These three classes handle the different effects applied to the image.
这三个类分别处理应用于图像的不同特效。
These classes can then be further derived for specific safe handle types.
然后，可针对特定的安全句柄类型对这些类进一步派生。
Derived classes should override this method to find out when the handle has been created.
派生类时应重写此方法以查看句柄是在何时创建的。
Derived classes should override this method to find out when the handle has been created.
派生类时应重写此方法以查看句柄是在何时创建的。
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