Added some os detection

Need to detect linux x86 or x64

dll/base.h

@@ -18,6 +18,20 @@
 #ifndef BASE_INCLUDE
 #define BASE_INCLUDE
 
+#if defined(WIN64) || defined(_WIN64) || defined(__MINGW64__)
+    #define __WINDOWS_64__
+#elif defined(WIN32) || defined(_WIN32) || defined(__MINGW32__)
+	#define __WINDOWS_32__
+#endif
+
+#if defined(__WINDOWS_32__) || defined(__WINDOWS_64__)
+	#define __WINDOWS__
+#endif
+
+#if defined(__linux__) || defined(linux)
+	#define __LINUX__
+#endif
+
 #if defined(WIN32) || defined(_WIN32)
 #define STEAM_WIN32
 #pragma warning( disable : 4716)

overlay_experimental/Windows_Hook.h

@@ -2,11 +2,9 @@
 #define __INCLUDED_WINDOWS_HOOK_H__
 
 #include "Base_Hook.h"
-#ifndef NO_OVERLAY
 
-#define WIN32_LEAN_AND_MEAN
-#define VC_EXTRALEAN
-#include <Windows.h>
+#ifdef __WINDOWS__
+#ifndef NO_OVERLAY
 
 class Windows_Hook : public Base_Hook
 {
@@ -48,4 +46,5 @@ public:
 };
 
 #endif//NO_OVERLAY
+#endif//__WINDOWS__
 #endif//__INCLUDED_WINDOWS_HOOK_H__