Index: reactos/sdk/include/ndk/rtlfuncs.h
===================================================================
--- reactos/sdk/include/ndk/rtlfuncs.h	(revision 73352)
+++ reactos/sdk/include/ndk/rtlfuncs.h	(working copy)
@@ -972,7 +972,7 @@
 
 _Must_inspect_result_
 NTSYSAPI
-NTSTATUS
+ULONG
 NTAPI
 RtlMultipleAllocateHeap (
     _In_ HANDLE HeapHandle,
@@ -983,7 +983,7 @@
     );
 
 NTSYSAPI
-NTSTATUS
+ULONG
 NTAPI
 RtlMultipleFreeHeap (
     _In_ HANDLE HeapHandle,
Index: reactos/sdk/lib/rtl/heap.c
===================================================================
--- reactos/sdk/lib/rtl/heap.c	(revision 73352)
+++ reactos/sdk/lib/rtl/heap.c	(working copy)
@@ -4,6 +4,7 @@
  * FILE:            lib/rtl/heap.c
  * PURPOSE:         RTL Heap backend allocator
  * PROGRAMMERS:     Copyright 2010 Aleksey Bragin
+ *                  Katayama Hirofumi MZ (katayama.hirofumi.mz@gmail.com)
  */
 
 /* Useful references:
@@ -3955,7 +3956,10 @@
     return STATUS_UNSUCCESSFUL;
 }
 
-NTSTATUS
+/*
+ * @implemented
+ */
+ULONG
 NTAPI
 RtlMultipleAllocateHeap(IN PVOID HeapHandle,
                         IN ULONG Flags,
@@ -3963,11 +3967,25 @@
                         IN ULONG Count,
                         OUT PVOID *Array)
 {
-    UNIMPLEMENTED;
-    return 0;
+    ULONG Index;
+
+    RtlZeroMemory(Array, Count * sizeof(PVOID));
+
+    for (Index = 0; Index < Count; ++Index)
+    {
+        Array[Index] = RtlAllocateHeap(HeapHandle, Flags, Size);
+        if (Array[Index] == NULL)
+        {
+            break;
+        }
+    }
+    return Index;
 }
 
-NTSTATUS
+/*
+ * @implemented
+ */
+ULONG
 NTAPI
 RtlMultipleFreeHeap(IN PVOID HeapHandle,
                     IN ULONG Flags,
@@ -3974,8 +3992,15 @@
                     IN ULONG Count,
                     OUT PVOID *Array)
 {
-    UNIMPLEMENTED;
-    return 0;
+    ULONG Index;
+    for (Index = 0; Index < Count; ++Index)
+    {
+        if (!RtlFreeHeap(HeapHandle, Flags, Array[Index]))
+            break;
+
+        Array[Index] = NULL;
+    }
+    return Index;
 }
 
 /* EOF */