shell32: Add a stub implementation of SHQueryUserNotificationState.

dlls/shell32/shell32.spec

@@ -409,6 +409,7 @@
 @ stdcall SHPathPrepareForWriteW(long ptr wstr long)
 @ stdcall SHQueryRecycleBinA(str ptr)
 @ stdcall SHQueryRecycleBinW(wstr ptr)
+@ stdcall SHQueryUserNotificationState(ptr)
 @ stdcall SHSetLocalizedName(wstr wstr long)
 @ stdcall SHSetUnreadMailCountW(wstr long wstr)
 @ stdcall SHUpdateRecycleBinIcon()

dlls/shell32/shell32_main.c

@@ -1404,3 +1404,13 @@ HRESULT WINAPI SHEnumerateUnreadMailAccountsW(HKEY user, DWORD idx, LPWSTR maila
     FIXME("%p %d %p %d: stub\n", user, idx, mailaddress, mailaddresslen);
     return E_NOTIMPL;
 }
+
+/***********************************************************************
+ *              SHQueryUserNotificationState (SHELL32.@)
+ */
+HRESULT WINAPI SHQueryUserNotificationState(QUERY_USER_NOTIFICATION_STATE *state)
+{
+    FIXME("%p: stub\n", state);
+    *state = QUNS_ACCEPTS_NOTIFICATIONS;
+    return S_OK;
+}

include/shellapi.h

@@ -490,6 +490,19 @@ HRESULT     WINAPI SHQueryRecycleBinW(LPCWSTR,LPSHQUERYRBINFO);
  * Misc
  */
 
+typedef enum
+{
+    QUNS_NOT_PRESENT             = 1,
+    QUNS_BUSY                    = 2,
+    QUNS_RUNNING_D3D_FULL_SCREEN = 3,
+    QUNS_PRESENTATION_MODE       = 4,
+    QUNS_ACCEPTS_NOTIFICATIONS   = 5,
+    QUNS_QUIET_TIME              = 6,
+    QUNS_APP                     = 7
+} QUERY_USER_NOTIFICATION_STATE;
+
+HRESULT     WINAPI SHQueryUserNotificationState(QUERY_USER_NOTIFICATION_STATE*);
+
 typedef enum SHSTOCKICONID
 {
     SIID_INVALID=-1,