SamConnect - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTSAM_H

//
// Functions
//

/**
 * The SamConnect function opens a SAM client context; NULL ServerName selects the local server.
 * ObjectAttributes is an unused compatibility argument. Close the context with SamCloseHandle.
 *
 * \param ServerName The server name, or NULL for the local server.
 * \param ServerHandle A handle representing a server.
 * \param DesiredAccess The access requested for ServerHandle upon output. 
 * \param ObjectAttributes Unused compatibility argument; may be NULL.
 * \return NTSTATUS Successful or errant status.
 * \sa https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-samr/47492d59-e095-4398-b03e-8a062b989123
 */
NTSYSAPI
NTSTATUS
NTAPI
SamConnect(
    _In_opt_ PCUNICODE_STRING ServerName,
    _Out_ PSAM_HANDLE ServerHandle,
    _In_ ACCESS_MASK DesiredAccess,
    _In_opt_ PCOBJECT_ATTRIBUTES ObjectAttributes
    );

#endif

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NtDoc

This function is a wrapper over an RPC method documented in the [MS-SAMR] specification.