diff --git a/reactos/include/reactos/subsys/sm/smmsg.h b/reactos/include/reactos/subsys/sm/smmsg.h
index b95841e8b03..023a381e7dc 100644
--- a/reactos/include/reactos/subsys/sm/smmsg.h
+++ b/reactos/include/reactos/subsys/sm/smmsg.h
@@ -43,7 +43,7 @@ typedef struct _SM_CREATE_FOREIGN_SESSION_MSG
 typedef struct _SM_SESSION_COMPLETE_MSG
 {
     ULONG SessionId;
-    NTSTATUS Status;
+    NTSTATUS SessionStatus;
 } SM_SESSION_COMPLETE_MSG, *PSM_SESSION_COMPLETE_MSG;
 
 typedef struct _SM_TERMINATE_FOREIGN_SESSION_MSG
@@ -218,6 +218,15 @@ C_ASSERT(sizeof(SB_CONNECTION_INFO) == 0xF4);
 C_ASSERT(sizeof(SB_API_MSG) == 0x110);
 #endif
 
+//
+// SB Message Handler
+//
+typedef
+BOOLEAN
+(NTAPI *PSB_API_ROUTINE)(
+    IN PSB_API_MSG SbApiMsg
+);
+
 //
 // The actual server functions that a client linking with smlib can call
 //
@@ -238,4 +247,12 @@ SmExecPgm(
     IN BOOLEAN DebugFlag
 );
 
+NTSTATUS
+NTAPI
+SmSessionComplete(
+    IN HANDLE SmApiPort,
+    IN ULONG SessionId,
+    IN NTSTATUS SessionStatus
+);
+
 #endif
diff --git a/reactos/lib/smlib/smclient.c b/reactos/lib/smlib/smclient.c
index 24a5f0a25a6..3f6311edd6e 100644
--- a/reactos/lib/smlib/smclient.c
+++ b/reactos/lib/smlib/smclient.c
@@ -128,3 +128,41 @@ SmConnectToSm(IN PUNICODE_STRING SbApiPortName,
     /* Return if the connection was successful or not */
     return Status;
 }
+
+NTSTATUS
+NTAPI
+SmSessionComplete(IN HANDLE SmApiPort,
+                  IN ULONG SessionId,
+                  IN NTSTATUS SessionStatus)
+{
+    NTSTATUS Status;
+    SM_API_MSG ApiMessage;
+    PSM_SESSION_COMPLETE_MSG SessionComplete = &ApiMessage.u.SessionComplete;
+
+    /* Set the message data */
+    SessionComplete->SessionId = SessionId;
+    SessionComplete->SessionStatus = SessionStatus;
+
+    /* Set the API Message Port Message header */
+    ApiMessage.ApiNumber = SmSessionCompleteApi;
+    ApiMessage.h.u1.s1.DataLength = sizeof(SM_SESSION_COMPLETE_MSG) + 8;
+    ApiMessage.h.u1.s1.TotalLength = sizeof(SM_API_MSG);
+    ApiMessage.h.u2.ZeroInit = 0;
+
+    /* Sent the message and wait for a reply */
+    Status = NtRequestWaitReplyPort(SmApiPort,
+                                    &ApiMessage.h,
+                                    &ApiMessage.h);
+    if (NT_SUCCESS(Status))
+    {
+        /* Return the real status */
+        Status = ApiMessage.ReturnValue;
+    }
+    else
+    {
+        DPRINT1("SmCompleteSession: NtRequestWaitReply failed\n");
+    }
+
+    /* Return status */
+    return Status;
+}