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What is the .OLB File Extension?

.OLB File Extension Description:

The OLB file extension identifies the foreign object library files in times when a code for Visual Basic has been created, especially with a version that is international and different from the English language version. This is important when you want to distribute your application, particularly if the user does not have the appropriate files with the .olb file extension.

If the application code actually calls for procedures that are written in other or multiple languages, the files with the .olb file extension are included in each of those languages along with all the workbooks and object libraries that are referenced by the application being distributed.

The files with the .olb file extension are necessary especially if you need to open files that have the earlier version. This is true even when you are using a version of Excel with similar language features. Though all Visual Basic projects in Excel 97 are compiled in the English language, workbooks created in earlier versions of Excel contain macros that are written in any language except English. Thus, the appropriate foreign language files with the .olb file extension need to be installed.

All registered owners of Microsoft Excel are allowed to distribute files with the .olb file extension along with their applications to other registered owners if necessary. Each of the files with the .olb file extension is a self-extracting and self-installing file that supports both Microsoft Excel and Visual Basic for Applications.

A file with the .olb file extension provides information to Automation controllers such as Visual Basic, C++ or other languages regarding available objects. The Object Browser can be used to examine the contents of these files to get information about the objects provided. When an application supports Automation, programming languages can access the objects that the application exposes.

Author: Microsoft Corporation
Author URL:
Related Applications: Microsoft Excel, Visual Basic, and C++
Common Path: N/A


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The Cause for .OLB files Errors:

.OLB files errors are possibly severe Windows file system errors and may be brought on because of a damaged registry that should be repaired immediately to protect against further damage in other software and/or devices. Receiving these errors places your personal computer at risk for fatal crashes, blue screen errors as well as hardware failure.

Symptoms of .OLB files Errors:

Common symptoms from .OLB files errors include slower computer performance, long program start up speed, problems opening documents, excessive suspensions in program procedures, software ends without giving an indication of error, screen freezing and programs crash.

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