History
- VB cusotm controls
- Dlls that expose properties and events
- VBX (VB extenstion) (1991)
- Based on 16 bit architecture
- Allow VB to access components written in C and C++
- OLE1.0 (1991)
- Deal with compound documents
- Not popular
- OLE2.0 (1993)
- Synonym to OLE
- Built on COM
Architecture
- Binary standard to allow coomponents to interact with each other as objects
- Not a programming language
- Exposes functionalities via interfaces