Intentionally avoid checking if the address of SystemFunction036, a.k.a.

RtlGenRandom, has been located or not. This function is only available on
WinXP and later. When unavailable c-ares uses portable rand() function.

ares.h

@@ -98,7 +98,6 @@ extern "C" {
 #define ARES_ELOADIPHLPAPI           21
 #define ARES_ELOADADVAPI32           22
 #define ARES_EADDRGetNetworkParams   23
-#define ARES_EADDRSYSTEMFUNCTION036  24
 
 /* Flag values */
 #define ARES_FLAG_USEVC         (1 << 0)

ares_library_init.c

@@ -51,12 +51,12 @@ static int ares_win32_init(void)
 
   fpSystemFunction036 = (fpSystemFunction036_t)
     GetProcAddress(hnd_advapi32, "SystemFunction036");
-  if (!fpSystemFunction036)
-    {
-      FreeLibrary(hnd_advapi32);
-      FreeLibrary(hnd_iphlpapi);
-      return ARES_EADDRSYSTEMFUNCTION036;
-    }
+
+  /*
+   * Intentionally avoid checking if the address of SystemFunction036, a.k.a.
+   * RtlGenRandom, has been located or not. This function is only available on
+   * WinXP and later. When unavailable c-ares uses portable rand() function.
+   */
 
 #endif
   return ARES_SUCCESS;

ares_strerror.c

@@ -46,8 +46,7 @@ const char *ares_strerror(int code)
     "Illegal hints flags specified",
     "Error loading iphlpapi.dll",
     "Error loading advapi32.dll",
-    "Unknown GetNetworkParams function address",
-    "Unknown SystemFunction036 function address"
+    "Could not find GetNetworkParams function"
   };
 
   if(code >= 0 && code < (int)(sizeof(errtext) / sizeof(*errtext)))