Improve the HHCTRL.OCX stub

[Jacek Caban]

Hi.

Two small suggestions.

+static char *command_to_string(UINT command)

It could be const char.

+{
+#define X(x) case x: return #x
+    
+    switch (command)
+    {
+        X( HH_DISPLAY_TOPIC );
+        X( HH_DISPLAY_TOC );
+        X( HH_DISPLAY_INDEX );
+        X( HH_DISPLAY_SEARCH );
+        X( HH_SET_WIN_TYPE );
+        X( HH_GET_WIN_TYPE );
+        X( HH_GET_WIN_HANDLE );
+        X( HH_ENUM_INFO_TYPE );
+        X( HH_SET_INFO_TYPE );
+        X( HH_SYNC );
+        X( HH_RESERVED1 );
+        X( HH_RESERVED2 );
+        X( HH_RESERVED3 );
+        X( HH_KEYWORD_LOOKUP );
+        X( HH_DISPLAY_TEXT_POPUP );
+        X( HH_HELP_CONTEXT );
+        X( HH_TP_HELP_CONTEXTMENU );
+        X( HH_TP_HELP_WM_HELP );
+        X( HH_CLOSE_ALL );
+        X( HH_ALINK_LOOKUP );
+        X( HH_GET_LAST_ERROR );
+        X( HH_ENUM_CATEGORY );
+        X( HH_ENUM_CATEGORY_IT );
+        X( HH_RESET_IT_FILTER );
+        X( HH_SET_INCLUSIVE_FILTER );
+        X( HH_SET_EXCLUSIVE_FILTER );
+        X( HH_INITIALIZE );
+        X( HH_UNINITIALIZE );
+        X( HH_PRETRANSLATEMESSAGE );
+        X( HH_SET_GLOBAL_PROPERTY );
+    }
+    
+#undef X    
+}

If command is not one of specificed in switch, function won't return a valid string.

Thanks,
    Jacek