diff --git a/MiniEngine.cpp b/MiniEngine.cpp
index e4b2650..eca5768 100644
--- a/MiniEngine.cpp
+++ b/MiniEngine.cpp
@@ -74,31 +74,6 @@ namespace MiniEngine
         delete pimpl;
     }
 
-    int SetClipboardText(const std::string& str)
-    {
-        return SDL_SetClipboardText(str.c_str());
-    }
-
-    std::string GetClipboardText()
-    {
-        char* pstr=SDL_GetClipboardText();
-        if(pstr==nullptr)
-        {
-            return std::string();
-        }
-        else
-        {
-            std::string s(pstr);
-            SDL_free(pstr);
-            return s;
-        }
-    }
-
-    bool HasClipboardText()
-    {
-        return SDL_HasClipboardText()==SDL_TRUE;
-    }
-
     bool GetScanKeyState(SDL_Scancode code)
     {
         return SDL_GetKeyboardState(NULL)[code];
diff --git a/MiniEngine.h b/MiniEngine.h
index e48ef73..0a7ce45 100644
--- a/MiniEngine.h
+++ b/MiniEngine.h
@@ -4,7 +4,6 @@
 #include <functional>
 #include "SDLWrapper/IncludeAll.h"
 
-
 namespace MiniEngine
 {
 	class StringEngine
@@ -24,10 +23,6 @@ namespace MiniEngine
         impl* pimpl;
 	};
 
-    int SetClipboardText(const std::string& str);
-    std::string GetClipboardText();
-    bool HasClipboardText();
-
     /// Experimental - For Experts: Use SDL ScanCode
     bool GetScanKeyState(SDL_Scancode);
 
diff --git a/SDLWrapper/SDLSystem.cpp b/SDLWrapper/SDLSystem.cpp
index f0d309f..c8d0c48 100644
--- a/SDLWrapper/SDLSystem.cpp
+++ b/SDLWrapper/SDLSystem.cpp
@@ -31,7 +31,7 @@ SDLSystem::SDLSystem(const std::initializer_list<SDLInitFlag>& flag_sdl,
     }
 
     ret=IMG_Init(img_flag);
-    if(ret!=0)
+    if(ret!=img_flag) /// IMG_Init returns its parameter on success.
     {
         ErrorViewer e;
         e.fetch();
@@ -39,7 +39,7 @@ SDLSystem::SDLSystem(const std::initializer_list<SDLInitFlag>& flag_sdl,
     }
 
     ret=Mix_Init(mix_flag);
-    if(ret!=0)
+    if(ret!=mix_flag) /// Mix_Init returns its parameter on success.
     {
         ErrorViewer e;
         e.fetch();