diff --git a/dlls/comctl32/listview.c b/dlls/comctl32/listview.c
index e73cb16..d594e51 100644
--- a/dlls/comctl32/listview.c
+++ b/dlls/comctl32/listview.c
@@ -137,7 +137,6 @@
  *   -- LVM_SETINFOTIP
  *   -- LVM_SETTILEWIDTH
  *   -- LVM_SORTGROUPS
- *   -- LVM_SORTITEMSEX
  *
  * Macros:
  *   -- ListView_GetCheckSate, ListView_SetCheckState
@@ -148,7 +147,6 @@
  *   -- ListView_GetTextBkColor
  *   -- ListView_GetUnicodeFormat, ListView_SetUnicodeFormat
  *   -- ListView_GetWorkAreas, ListView_SetWorkAreas
- *   -- ListView_SortItemsEx
  *
  * Functions:
  *   -- LVGroupComparE
@@ -422,7 +420,6 @@
 static void LISTVIEW_UpdateSize(LISTVIEW_INFO *);
 static HWND LISTVIEW_EditLabelT(LISTVIEW_INFO *, INT, BOOL);
 static LRESULT LISTVIEW_Command(const LISTVIEW_INFO *, WPARAM, LPARAM);
-static BOOL LISTVIEW_SortItems(LISTVIEW_INFO *, PFNLVCOMPARE, LPARAM);
 static INT LISTVIEW_GetStringWidthT(const LISTVIEW_INFO *, LPCWSTR, BOOL);
 static BOOL LISTVIEW_KeySelection(LISTVIEW_INFO *, INT, BOOL);
 static UINT LISTVIEW_GetItemState(const LISTVIEW_INFO *, INT, UINT);
@@ -7835,7 +7832,7 @@
 
 /***
  * DESCRIPTION:
- * Callback internally used by LISTVIEW_SortItems()
+ * Callback internally used by LISTVIEW_SortItems() in response of LVM_SORTITEMS
  *
  * PARAMETER(S):
  * [I] first : pointer to first ITEM_INFO to compare
@@ -7859,18 +7856,44 @@
 
 /***
  * DESCRIPTION:
+ * Callback internally used by LISTVIEW_SortItems() in response of LVM_SORTITEMSEX
+ *
+ * PARAMETER(S):
+ * [I] first : pointer to first ITEM_INFO to compare
+ * [I] second : pointer to second ITEM_INFO to compare
+ * [I] lParam : HWND of control
+ *
+ * RETURN:
+ *   if first comes before second : negative
+ *   if first comes after second : positive
+ *   if first and second are equivalent : zero
+ */
+static INT WINAPI LISTVIEW_CallBackCompareEx(LPVOID first, LPVOID second, LPARAM lParam)
+{
+  LISTVIEW_INFO *infoPtr = (LISTVIEW_INFO *)lParam;
+  INT first_idx  = DPA_GetPtrIndex( infoPtr->hdpaItems, first  );
+  INT second_idx = DPA_GetPtrIndex( infoPtr->hdpaItems, second );
+
+  /* Forward the call to the client defined callback */
+  return (infoPtr->pfnCompare)( first_idx, second_idx, infoPtr->lParamSort );
+}
+
+/***
+ * DESCRIPTION:
  * Sorts the listview items.
  *
  * PARAMETER(S):
  * [I] infoPtr : valid pointer to the listview structure
  * [I] pfnCompare : application-defined value
  * [I] lParamSort : pointer to comparison callback
+ * [I] IsEx : TRUE when LVM_SORTITEMSEX used
  *
  * RETURN:
  *   SUCCESS : TRUE
  *   FAILURE : FALSE
  */
-static BOOL LISTVIEW_SortItems(LISTVIEW_INFO *infoPtr, PFNLVCOMPARE pfnCompare, LPARAM lParamSort)
+static BOOL LISTVIEW_SortItems(LISTVIEW_INFO *infoPtr, PFNLVCOMPARE pfnCompare,
+                               LPARAM lParamSort, BOOL IsEx)
 {
     UINT uView = infoPtr->dwStyle & LVS_TYPEMASK;
     HDPA hdpaSubItems;
@@ -7900,7 +7923,10 @@
 
     infoPtr->pfnCompare = pfnCompare;
     infoPtr->lParamSort = lParamSort;
-    DPA_Sort(infoPtr->hdpaItems, LISTVIEW_CallBackCompare, (LPARAM)infoPtr);
+    if (IsEx)
+        DPA_Sort(infoPtr->hdpaItems, LISTVIEW_CallBackCompareEx, (LPARAM)infoPtr);
+    else
+        DPA_Sort(infoPtr->hdpaItems, LISTVIEW_CallBackCompare, (LPARAM)infoPtr);
 
     /* restore selection ranges */
     for (i=0; i < infoPtr->nItemCount; i++)
@@ -10022,9 +10048,10 @@
   /* case LVM_SORTGROUPS: */
 
   case LVM_SORTITEMS:
-    return LISTVIEW_SortItems(infoPtr, (PFNLVCOMPARE)lParam, (LPARAM)wParam);
+    return LISTVIEW_SortItems(infoPtr, (PFNLVCOMPARE)lParam, (LPARAM)wParam, FALSE);
 
-  /* LVM_SORTITEMSEX: */
+  case LVM_SORTITEMSEX:
+    return LISTVIEW_SortItems(infoPtr, (PFNLVCOMPARE)lParam, (LPARAM)wParam, TRUE);
 
   case LVM_SUBITEMHITTEST:
     return LISTVIEW_HitTest(infoPtr, (LPLVHITTESTINFO)lParam, TRUE, FALSE);
diff --git a/include/commctrl.h b/include/commctrl.h
index bebdb27..a3ec513 100644
--- a/include/commctrl.h
+++ b/include/commctrl.h
@@ -3147,6 +3147,7 @@
 #define LVM_SETITEMTEXT         WINELIB_NAME_AW(LVM_SETITEMTEXT)
 #define LVM_SETITEMCOUNT        (LVM_FIRST+47)
 #define LVM_SORTITEMS           (LVM_FIRST+48)
+#define LVM_SORTITEMSEX         (LVM_FIRST+81)
 #define LVM_SETITEMPOSITION32   (LVM_FIRST+49)
 #define LVM_GETSELECTEDCOUNT    (LVM_FIRST+50)
 #define LVM_GETITEMSPACING      (LVM_FIRST+51)
@@ -3772,6 +3773,9 @@
 
 #define ListView_SortItems(hwndLV,_pfnCompare,_lPrm) \
     (BOOL)SNDMSGA((hwndLV),LVM_SORTITEMS,(WPARAM)(LPARAM)_lPrm,(LPARAM)(PFNLVCOMPARE)_pfnCompare)
+#define ListView_SortItemsEx(hwndLV, _pfnCompare, _lPrm) \
+  (BOOL)SNDMSGA((hwndLV), LVM_SORTITEMSEX, (WPARAM)(LPARAM)(_lPrm), (LPARAM)(PFNLVCOMPARE)(_pfnCompare))
+
 #define ListView_SetItemPosition(hwndLV, i, x, y) \
     (BOOL)SNDMSGA((hwndLV),LVM_SETITEMPOSITION,(WPARAM)(INT)(i),MAKELPARAM((x),(y)))
 #define ListView_GetSelectedCount(hwndLV) \