Extension Version Information

This section provides detailed compatibility information for previous versions of ISAPI and IIS.

• ISAPI 2.0 and 3.0: Provides information about ISAPI features introduced in IIS 2.0 and 3.0.
• ISAPI 4.0: Provides information about ISAPI features introduced in IIS 4.0.
• ISAPI 5.0: Provides information about ISAPI features introduced in IIS 5.0.