An object library maps the program commands of an application so that external coding environments can control it. Microsoft maps these libraries by version numbers:

Some legacy server-side scripts or Windows administrative scripts used early binding to Excel9.olb . When migrating servers, the library is absent.

Dim objExcel As Object Dim objWorkbook As Object

The cleanest approach is to recompile the app with late binding or add a reference to the latest installed Excel version. If recompilation is impossible, install Office 2000 on a legacy VM.

Here is why downloading the Object Library from a third-party site is dangerous:

Microsoft Excel 9.0 Object Library Download [updated] Jun 2026

An object library maps the program commands of an application so that external coding environments can control it. Microsoft maps these libraries by version numbers:

Some legacy server-side scripts or Windows administrative scripts used early binding to Excel9.olb . When migrating servers, the library is absent.

Dim objExcel As Object Dim objWorkbook As Object

The cleanest approach is to recompile the app with late binding or add a reference to the latest installed Excel version. If recompilation is impossible, install Office 2000 on a legacy VM.

Here is why downloading the Object Library from a third-party site is dangerous: