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The following list provides concise descriptions of each Winsock SPI structure. For additional information on any Winsock SPI structure, click the structure name.
| Winsock SPI structure | Description |
|---|---|
| NSP_ROUTINE | Contains information on the functions implemented by a namespace service provider version 1 (NSPv1) provider. |
| NSPV2_ROUTINE | Contains information on the functions implemented by a namespace service provider version 2 (NSPv2) provider. |
| WSATHREADID | Enables a provider to identify a thread on which asynchronous procedure calls (APCs) can be queued. |
| WSC_PROVIDER_AUDIT_INFO | Contains audit information for a layered service provider (LSP) entry. |
| WSPDATA | Contains service provider information. |
| WSPPROC_TABLE | Contains a table of pointers to service provider functions. |
| WSPUPCALLTABLE | Contains a table of pointers to service provider upcall functions. |