What is COM/DCOM in VB?

Question

Can any light on Com/Dcom in VB. Please give some example to understand the concept of Com/DCom. Where does it used?

Answer 1

COM/DCOM is a technique to communicate the encapsulated properties and methods of pre-built and compiled classes.

COM in particular stands for Component Object Model. Under this model, the VB application references one/many components(Compiled in the form of DLL) and uses it to access its functions.

The benefit of using this model is that one single component may be reused by different applications. All the application have to do is to instantiate an object of this COM Component in its memory.

The ideal example in this case would be a Clipart which is used among all office applications, whether its word, excel or powerpoint. So you may say the clipart is a different module which is packed as a different Component and any program may call it to show clips stored in the common repository.