What is the difference between early binding and late binding in VBA?

What is the difference between early binding and late binding in VBA?

excel-vba Binding Early Binding vs Late Binding Early binding (also known as static binding) is when an object declared in Excel is of a specific object type, such as a Worksheet or Workbook. Late binding occurs when general object associations are made, such as the Object and Variant declaration types.

What is late binding Visual Basic?

By contrast, an object is late bound when it is assigned to a variable declared to be of type Object . Objects of this type can hold references to any object, but lack many of the advantages of early-bound objects.

When should we use late binding?

Late binding is still useful in situations where the exact interface of an object is not known at design-time. If your application seeks to talk with multiple unknown servers or needs to invoke functions by name (using the Visual Basic 6.0 CallByName function for example) then you need to use late binding.

What is late binding polymorphism?

Polymorphism means the ability of an object to respond to a message according to what type of object it actually is.

What is late binding in oops?

In . NET, late binding refers to overriding a virtual method like C++ or implementing an interface. The compiler builds virtual tables for every virtual or interface method call which is used at run-time to determine the implementation to execute.

What does late binding refers to?

Late binding is a runtime process of looking up a declaration, by name, that corresponds to a uniquely specified type. It does not involve type checking during compilation, when referencing libraries, including an object, is not required.

Why should one use late binding in oops?

The primary advantage of using late binding in Component Object Model (COM) programming is that it does not require the compiler to reference the libraries that contain the object at compile time.

What are its advantages and disadvantages of late binding?

With late binding, the program has to read the address held in the pointer and then jump to that address. This involves one extra step, making it slightly slower. here, there is no advantage of using late binding and early binding as in the example below should be preferred.