can u plz briefly explain what is the use of this file & how to create it. it is not mentioned in the tutorial.

It contains constants used in ADO. For instance, you you can use adExecuteNoRecords, which is a constant declared in adovbs.inc, instead of numeric value like 4. This makes developing ADO code fun and is more convenient. And when you look at someome else's code, it is more easy to understand what is going on by looking at the names of constants than their numeric values.

To use this file, you have to include it in your code as shown in the tutorial.