"Class reference" Concept

Source: Internet
Author: User
"Class reference" is only a region in the memory, which contains information about the relevant classes, which is the same as the class type definition. When you use the VCL stream system or the registerclass () function to register this class, the class reference enters the memory. The findclass () function finds the memory area, locates a class with a specified class name, and returns a pointer to that position, which is different from the class instance. A class instance is generally created when a constructor is called. For example, tchildformclass = Class of tchildform; the variable tchildformclass is a reference to the class of tchildform, and can access the class reference of a tchildform derived class in a multi-state. "Class reference" is also called "Class class ".

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