Add version resource to .dlls; don't list them if it's missing or has

wrong value.

xwords4/wince/ceresstr.c

@@ -189,6 +189,20 @@ copyWideStr( CEAppGlobals* globals, const wchar_t* str, wchar_t** loc )
     wcscpy( *loc, str );
  }
 
+static XP_U16
+getDLLVersion( HINSTANCE hinst )
+{
+    XP_U16 version = 0;         /* illegal value */
+    HRSRC rsrcH = FindResource( hinst, MAKEINTRESOURCE(ID_DLLVERS_RES),
+                                TEXT("DLLV") );
+    if ( !!rsrcH ) {
+        HGLOBAL globH = LoadResource( hinst, rsrcH );
+        version = *(XP_U16*)globH;
+        DeleteObject( globH );
+    }
+    return version;
+}
+
 /* Iterate through .dll files listing the name of any that has one.  Pair with
  * file from which it came since that's what we'll return.
  */
@@ -219,7 +233,9 @@ listDlls( DllSelState* state )
 
         HINSTANCE hinst = LoadLibrary( data.cFileName );
         if ( !!hinst ) {
-            if ( LoadString( hinst, IDS_LANGUAGE_NAME, 
+            if ( CUR_DLL_VERSION != getDLLVersion( hinst ) ) {
+                /* do nothing; wrong version (or just not our .dll) */
+            } else if ( LoadString( hinst, IDS_LANGUAGE_NAME, 
                              name, VSIZE(name) ) ) {
                 (void)SendDlgItemMessage( hDlg, state->dllListID, 
                                           ADDSTRING(globals), 0, (LPARAM)name );

xwords4/wince/l10n/xwords4_caps.rc

@@ -172,6 +172,8 @@ END
 
 #include "../rc_incs.h"
 
+DLL_VERS_RESOURCE
+
 /////////////////////////////////////////////////////////////////////////////
 //
 // Dialog

xwords4/wince/l10n/xwords4_french.rc

@@ -172,6 +172,8 @@ END
 
 #include "../rc_incs.h"
 
+DLL_VERS_RESOURCE
+
 /////////////////////////////////////////////////////////////////////////////
 //
 // Dialog

xwords4/wince/rc_incs.h

@@ -23,3 +23,9 @@
 #endif
 
 #define ABOUT_VERSION "4.2.1 b1"
+
+#define DLL_VERS_RESOURCE              \
+ID_DLLVERS_RES DLLV MOVEABLE PURE      \
+BEGIN                                  \
+    CUR_DLL_VERSION                    \
+END

xwords4/wince/resource.h

@@ -249,6 +249,7 @@
 
 #define ID_COLORS_RES                   9999
 #define ID_BONUS_RES                    9998
+#define ID_DLLVERS_RES                  9997
 
 #define IDM_MAIN_COMMAND1				40001
 #define IDS_DUMMY                       40002

xwords4/wince/strids.h

@@ -8,6 +8,13 @@
 #ifndef _STRIDS_H_
 #define _STRIDS_H_
 
+/* CUR_DLL_VERSION is included in all .dll resources and can be used to check
+ * whether a given resource can be trusted.  Up it when changing the order of
+ * strings.  Which do only when unavoidable.
+ */
+#define CUR_DLL_VERSION 0x0001
+
+
 #define CE_FIRST_RES_ID                                              40002
 
 #define IDS_MENU                                           CE_FIRST_RES_ID