White Paper: The Essentials of Replacing Msgina.dll (810756)

SUMMARY

This white paper explains how the Microsoft Graphical Identification and Authentication (GINA) dynamic link library (DLL) works and clarifies the current documentation about how to replace the Msgina.dll file.

This document includes information about the following topics:

• Introduction.
• Responsibilities of Winlogon.
• Standard Features of the Msgina.dll.
• Necessary Functions of Msgina.dll.
• Helper Functions Called by the Msgina.dll.

Note: If you try to use a new GINA file, your computer may not start correctly. See the "Recovering From a GINA-related System Failure" preface at the beginning of this document for troubleshooting information.