mshtml: Expose IDocumentEvent to scripts.

dlls/mshtml/htmldoc.c

@@ -5107,8 +5107,10 @@ static void HTMLDocumentNode_init_dispex_info(dispex_data_t *info, compat_mode_t
 {
     HTMLDOMNode_init_dispex_info(info, mode);
 
-    if(mode >= COMPAT_MODE_IE9)
+    if(mode >= COMPAT_MODE_IE9) {
         dispex_info_add_interface(info, IHTMLDocument7_tid, NULL);
+        dispex_info_add_interface(info, IDocumentEvent_tid, NULL);
+    }
 
     /* Depending on compatibility version, we add interfaces in different order
      * so that the right getElementById implementation is used. */

dlls/mshtml/mshtml_private.h

@@ -126,6 +126,7 @@ typedef struct EventTarget EventTarget;
     XDIID(HTMLDocumentEvents) \
     XDIID(HTMLElementEvents2) \
     XIID(IDOMEvent) \
+    XIID(IDocumentEvent) \
     XIID(IDocumentSelector) \
     XIID(IElementSelector) \
     XIID(IElementTraversal) \

dlls/mshtml/tests/documentmode.js

@@ -62,6 +62,7 @@ function test_doc_props() {
     test_exposed("addEventListener", v >= 9);
     test_exposed("removeEventListener", v >= 9);
     test_exposed("dispatchEvent", v >= 9);
+    test_exposed("createEvent", v >= 9);
 
     test_exposed("parentWindow", true);
     if(v >= 9) ok(document.defaultView === document.parentWindow, "defaultView != parentWindow");