SpUserModeInitializeFn callback function

The SpUserModeInitialize function is called when a security support provider/authentication package (SSP/AP) DLL is loaded into the process space of a client/server application. This function provides the SECPKG_USER_FUNCTION_TABLE tables for each security package in the SSP/AP DLL.


SpUserModeInitializeFn Spusermodeinitializefn;

NTSTATUS Spusermodeinitializefn(
  ULONG LsaVersion,
  PULONG PackageVersion,
  PULONG pcTables



The version of the security provider DLL (either Secur32.dll or Security.dll).


Pointer that returns the version of the SSP/AP DLL.


Pointer that returns an array of SECPKG_USER_FUNCTION_TABLE structures. Each structure is a table of pointers to the user-mode functions implemented by a security package deployed in the SSP/AP DLL.


Pointer that returns the number of elements in the array pointed to by the ppTables parameter.

Return Value

If the function succeeds, return STATUS_SUCCESS.

If the function fails, return an NTSTATUS code that indicates the reason it failed.


The SpUserModeInitialize function must be implemented by SSP/AP DLLs that contain user-mode security packages.

The ppTables parameter should contain one SECPKG_USER_FUNCTION_TABLE for each user-mode security package deployed in the DLL. For more information on deploying security packages in DLLs, see User Mode Initialization.


Windows version Windows XP [desktop apps only] Windows Server 2003 [desktop apps only]
Target Platform Windows
Header ntsecpkg.h

See Also