mshtml: Added alert implementation.

dlls/mshtml/htmlwindow.c

@@ -193,8 +193,18 @@ static HRESULT WINAPI HTMLWindow2_clearTimeout(IHTMLWindow2 *iface, long timerID
 static HRESULT WINAPI HTMLWindow2_alert(IHTMLWindow2 *iface, BSTR message)
 {
     HTMLWindow *This = HTMLWINDOW2_THIS(iface);
-    FIXME("(%p)->(%s)\n", This, debugstr_w(message));
-    return E_NOTIMPL;
+    WCHAR wszTitle[100];
+
+    TRACE("(%p)->(%s)\n", This, debugstr_w(message));
+
+    if(!LoadStringW(get_shdoclc(), IDS_MESSAGE_BOX_TITLE, wszTitle,
+                    sizeof(wszTitle)/sizeof(WCHAR))) {
+        WARN("Could not load message box title: %d\n", GetLastError());
+        return S_OK;
+    }
+
+    MessageBoxW(This->doc->hwnd, message, wszTitle, MB_ICONWARNING);
+    return S_OK;
 }
 
 static HRESULT WINAPI HTMLWindow2_confirm(IHTMLWindow2 *iface, BSTR message,

dlls/mshtml/resource.h

@@ -26,6 +26,8 @@
 #define ID_DWL_INSTALL      7602
 #define ID_DWL_STATUS       7603
 
+#define IDS_MESSAGE_BOX_TITLE  2213
+
 #define IDR_BROWSE_CONTEXT_MENU  24641
 
 #define IDM_TRACETAGS           6004