Always define winversion

CMake/Platforms.cmake

@@ -1,7 +1,3 @@
-if(WIN32)
-  include(platforms/windows)
-endif()
-
 if(HAIKU)
   include(platforms/haiku)
 endif()
@@ -35,6 +31,8 @@ elseif(TARGET_PLATFORM STREQUAL "miyoo_mini")
   include(platforms/miyoo_mini)
 elseif(TARGET_PLATORM STREQUAL "windows9x")
   include(platforms/windows9x)
+elseif(WIN32)
+  include(platforms/windows)
 endif()
 
 if(NINTENDO_SWITCH)

CMake/platforms/windows.cmake

@@ -10,6 +10,8 @@ list(APPEND DEVILUTIONX_PLATFORM_LINK_LIBRARIES
   wininet
 )
 
+add_definitions(-DWINVER=0x0601 -D_WIN32_WINDOWS=0x0601 -D_WIN32_WINNT=0x0601)
+
 if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
   list(APPEND DEVILUTIONX_PLATFORM_COMPILE_OPTIONS "/W3" "/Zc:__cplusplus" "/utf-8")
   list(APPEND DEVILUTIONX_PLATFORM_COMPILE_DEFINITIONS _CRT_SECURE_NO_WARNINGS)