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VBA can use, but not create, ActiveX/COM DLLs, and later versions add support for class modules. VBA is built into most Microsoft Office applications, including Office for Mac OS X (except version 2008), and other Microsoft applications, including Microsoft MapPoint and Microsoft Visio.
This is a module definition. Modules are a division of code, which can contain any kind of object, like constants or variables, functions or methods, or classes, but can not be instantiated as objects like classes and cannot inherit from other modules. Modules serve as containers of code that can be referenced from other parts of a program. [8]
MustInherit vs abstract - prevents a class from being directly instantiated, and forces consumers to create object references to only derived classes; MustOverride vs abstract - for forcing derived classes to override this method; MyBase vs base - for referring to the base class from which the current class is derived; NotInheritable vs sealed ...
Classic Visual Basic, VBA, VBScript: Unique variants. Fortran. ... (except when it is the first statement in the body of a module, class or function; ...
It supported classes, but not other concepts that would make it an object-oriented language. Visual Basic .NET is a true object-oriented language with the following features: inheritance; function overloading; Although no language targeting .NET allows for multiple inheritance for classes—multiple inheritance of interfaces is supported.
Visual Basic 2.0 was released in November 1992. The programming environment was easier to use, and its speed was improved. Notably, forms became instantiable objects, thus laying the foundational concepts of class modules as were later offered in VB4. Visual Basic 3.0 was released in the summer of 1993 and came in Standard and Professional ...
VBA allows the creation of forms and in‑worksheet controls to communicate with the user. The language supports use (but not creation) of ActiveX DLL's; later versions add support for class modules allowing the use of basic object-oriented programming techniques. The automation functionality provided by VBA made Excel a target for macro ...
When the COM class factory tries to instantiate a class, the activation context is first checked to see if an implementation for the CLSID can be found. Only if the lookup fails, the registry is scanned. [16] A COM object can be created without type library information; with only a path to the DLL file and CLSID.