diff --git a/sdk/lib/rtl/unicode.c b/sdk/lib/rtl/unicode.c
index 7f04540132..0524c5922c 100644
--- a/sdk/lib/rtl/unicode.c
+++ b/sdk/lib/rtl/unicode.c
@@ -3,7 +3,7 @@
  * PROJECT:           ReactOS system libraries
  * PURPOSE:           Unicode Conversion Routines
  * FILE:              lib/rtl/unicode.c
- * PROGRAMMER:        Alex Ionescu (alex@relsoft.net)
+ * PROGRAMMER:        Alex Ionescu (alex.ionescu@reactos.org)
  *                    Emanuele Aliberti
  *                    Gunnar Dalsnes
  */
@@ -32,19 +32,71 @@ extern PUSHORT NlsUnicodeToMbOemTable;
 
 /* FUNCTIONS *****************************************************************/
 
+/*
+ * @implemented
+ */
 NTSTATUS
 NTAPI
 RtlMultiAppendUnicodeStringBuffer(OUT PRTL_UNICODE_STRING_BUFFER StringBuffer,
-                                  IN ULONG NumberOfAddends,
-                                  IN PCUNICODE_STRING Addends)
+                                  IN ULONG NumberOfStrings,
+                                  IN PCUNICODE_STRING StringArray)
 {
-    UNIMPLEMENTED;
-    return STATUS_NOT_IMPLEMENTED;
+    NTSTATUS Status;
+    SIZE_T Length, TotalLength, MaximumLength;
+    ULONG i;
+
+    Length = TotalLength = StringBuffer->String.Length;
+
+    /* Determine the total length we need for the destination string buffer */
+    i = 0;
+    while (i < NumberOfStrings)
+    {
+        TotalLength += StringArray[i++].Length;
+
+        /* Fail if we overflow */
+        if (TotalLength > UNICODE_STRING_MAX_BYTES)
+            return STATUS_NAME_TOO_LONG;
+    }
+
+    /* Account for the terminating NULL character */
+    MaximumLength = TotalLength + sizeof(UNICODE_NULL);
+
+    /* Fail if we overflow */
+    if (MaximumLength > UNICODE_STRING_MAX_BYTES)
+        return STATUS_NAME_TOO_LONG;
+
+    /*
+     * Ensure the size of the destination string buffer is big
+     * enough to hold the result, and grow it if necessary.
+     */
+    Status = RtlEnsureBufferSize(0, &StringBuffer->ByteBuffer, MaximumLength);
+    if (!NT_SUCCESS(Status)) return Status;
+
+    /* Initialize the destination string */
+    StringBuffer->String.Buffer = (PWSTR)StringBuffer->ByteBuffer.Buffer;
+    StringBuffer->String.Length = (USHORT)TotalLength;
+    StringBuffer->String.MaximumLength = (USHORT)MaximumLength;
+
+    /* Append each string into the destination string */
+    i = 0;
+    while (i < NumberOfStrings)
+    {
+        RtlMoveMemory(&StringBuffer->String.Buffer[Length / sizeof(WCHAR)],
+                      StringArray[i].Buffer,
+                      StringArray[i].Length);
+        Length += StringArray[i++].Length;
+    }
+
+    /* NULL-terminate the destination string */
+    StringBuffer->String.Buffer[Length / sizeof(WCHAR)] = UNICODE_NULL;
+
+    /* Done */
+    return STATUS_SUCCESS; 
 }
 
 /*
-* @implemented
-*/
+ * @implemented
+ */
 WCHAR
 NTAPI
 RtlAnsiCharToUnicodeChar(IN OUT PUCHAR *AnsiChar)
@@ -2549,7 +2601,10 @@ RtlValidateUnicodeString(
     if (Flags != 0)
         return STATUS_INVALID_PARAMETER;
 
-    /* NOTE: a NULL Unicode string pointer is considered to be a valid one! */
+    /* NOTE:
+     * A NULL Unicode string pointer is considered
+     * to be a valid unicode string!
+     */
     if (String == NULL)
     {
         return STATUS_SUCCESS;