Author: Microsoft Corporation. The VBX file extension is used to refer to custom control files created in the Visual Basic programming code. VBX custom control files are written with internal interpretive language code that can run immediately after they are written.uthor: Microsoft Corporation. The VBX file extension is used to refer to custom control files created in the Visual Basic programming code. VBX custom control files are written with internal interpretive language code that can run immediately after they are written.
Natural phenomenon. A natural phenomenon is not an engineered event manufactured by humans, although it may affect them. Common examples of natural phenomena include sunrise, the weather, decomposition, free fall and erosion.atural phenomenon. A natural phenomenon is not an engineered event manufactured by humans, although it may affect them. Common examples of natural phenomena include sunrise, the weather, decomposition, free fall and erosion.
Definition of occurrence. 1  1 : something that occurs a startling occurrence Lightning is a natural occurrence. 2  2 : the action or fact of happening or occurring âoften used with of the repeated occurrence of petty theft in the locker room.