diff --git a/reactos/dll/win32/samlib/samlib.c b/reactos/dll/win32/samlib/samlib.c
index 7f07d5aa9a5..8c52b49c069 100644
--- a/reactos/dll/win32/samlib/samlib.c
+++ b/reactos/dll/win32/samlib/samlib.c
@@ -128,6 +128,66 @@ SamAddMemberToAlias(IN SAM_HANDLE AliasHandle,
 }
 
 
+NTSTATUS
+NTAPI
+SamAddMemberToGroup(IN SAM_HANDLE GroupHandle,
+                    IN ULONG MemberId,
+                    IN ULONG Attributes)
+{
+    NTSTATUS Status;
+
+    TRACE("SamAddMemberToGroup(%p %lu %lx)",
+          GroupHandle, MemberId, Attributes);
+
+    RpcTryExcept
+    {
+        Status = SamrAddMemberToGroup((SAMPR_HANDLE)GroupHandle,
+                                      MemberId,
+                                      Attributes);
+    }
+    RpcExcept(EXCEPTION_EXECUTE_HANDLER)
+    {
+        Status = I_RpcMapWin32Status(RpcExceptionCode());
+    }
+    RpcEndExcept;
+
+    return Status;
+}
+
+
+NTSTATUS
+NTAPI
+SamAddMultipleMembersToAlias(IN SAM_HANDLE AliasHandle,
+                             IN PSID *MemberIds,
+                             IN ULONG MemberCount)
+{
+    SAMPR_PSID_ARRAY Buffer;
+    NTSTATUS Status;
+
+    TRACE("SamAddMultipleMembersToAlias(%p %p %lu)\n",
+          AliasHandle, MemberIds, MemberCount);
+
+    if (MemberIds == NULL)
+        return STATUS_INVALID_PARAMETER_2;
+
+    Buffer.Count = MemberCount;
+    Buffer.Sids  = (PSAMPR_SID_INFORMATION)MemberIds;
+
+    RpcTryExcept
+    {
+        Status = SamrAddMultipleMembersToAlias((SAMPR_HANDLE)AliasHandle,
+                                               &Buffer);
+    }
+    RpcExcept(EXCEPTION_EXECUTE_HANDLER)
+    {
+        Status = I_RpcMapWin32Status(RpcExceptionCode());
+    }
+    RpcEndExcept;
+
+    return Status;
+}
+
+
 NTSTATUS
 NTAPI
 SamCloseHandle(IN SAM_HANDLE SamHandle)
@@ -320,6 +380,34 @@ SamCreateUserInDomain(IN SAM_HANDLE DomainHandle,
 }
 
 
+NTSTATUS
+NTAPI
+SamDeleteUser(IN SAM_HANDLE UserHandle)
+{
+    SAMPR_HANDLE LocalUserHandle;
+    NTSTATUS Status;
+
+    TRACE("SamDeleteUser(%p)\n", UserHandle);
+
+    LocalUserHandle = (SAMPR_HANDLE)UserHandle;
+
+    if (LocalUserHandle == NULL)
+        return STATUS_INVALID_HANDLE;
+
+    RpcTryExcept
+    {
+        Status = SamrDeleteUser(&LocalUserHandle);
+    }
+    RpcExcept(EXCEPTION_EXECUTE_HANDLER)
+    {
+        Status = I_RpcMapWin32Status(RpcExceptionCode());
+    }
+    RpcEndExcept;
+
+    return Status;
+}
+
+
 NTSTATUS
 NTAPI
 SamEnumerateAliasesInDomain(IN SAM_HANDLE DomainHandle,
diff --git a/reactos/dll/win32/samlib/samlib.spec b/reactos/dll/win32/samlib/samlib.spec
index acdb6959397..749afc89bac 100644
--- a/reactos/dll/win32/samlib/samlib.spec
+++ b/reactos/dll/win32/samlib/samlib.spec
@@ -1,6 +1,6 @@
 @ stdcall SamAddMemberToAlias(ptr ptr)
-@ stub SamAddMemberToGroup
-@ stub SamAddMultipleMembersToAlias
+@ stdcall SamAddMemberToGroup(ptr long long)
+@ stdcall SamAddMultipleMembersToAlias(ptr ptr long)
 @ stub SamChangePasswordUser2
 @ stub SamChangePasswordUser3
 @ stub SamChangePasswordUser
@@ -13,7 +13,7 @@
 @ stdcall SamCreateUserInDomain(ptr ptr long ptr ptr)
 @ stub SamDeleteAlias
 @ stub SamDeleteGroup
-@ stub SamDeleteUser
+@ stdcall SamDeleteUser(ptr)
 @ stdcall SamEnumerateAliasesInDomain(ptr ptr ptr long ptr)
 @ stdcall SamEnumerateDomainsInSamServer(ptr ptr ptr long ptr)
 @ stdcall SamEnumerateGroupsInDomain(ptr ptr ptr long ptr)
diff --git a/reactos/include/ddk/ntsam.h b/reactos/include/ddk/ntsam.h
index 69b5e345356..00918739977 100644
--- a/reactos/include/ddk/ntsam.h
+++ b/reactos/include/ddk/ntsam.h
@@ -322,6 +322,12 @@ SamAddMemberToGroup(IN SAM_HANDLE GroupHandle,
                     IN ULONG MemberId,
                     IN ULONG Attributes);
 
+NTSTATUS
+NTAPI
+SamAddMultipleMembersToAlias(IN SAM_HANDLE AliasHandle,
+                             IN PSID *MemberIds,
+                             IN ULONG MemberCount);
+
 NTSTATUS
 NTAPI
 SamCloseHandle(IN SAM_HANDLE SamHandle);
@@ -367,6 +373,10 @@ SamCreateUserInDomain(IN SAM_HANDLE DomainHandle,
                       OUT PSAM_HANDLE UserHandle,
                       OUT PULONG RelativeId);
 
+NTSTATUS
+NTAPI
+SamDeleteUser(IN SAM_HANDLE UserHandle);
+
 NTSTATUS
 NTAPI
 SamEnumerateAliasesInDomain(IN SAM_HANDLE DomainHandle,