From Benoit Laniel, "I use mingw to cross-compile openscenegraph to win32. However, linux

filesystem is case-sensitive. Here are the modifications needed to make
the compiler happy. These are only some include lines rewritten (Io.h to
io.h, Windows.h to windows.h etc.) for version 2.3.7."

src/osgDB/DynamicLibrary.cpp

@@ -20,9 +20,9 @@
 #endif
 
 #if defined(WIN32) && !defined(__CYGWIN__)
-#include <Io.h>
-#include <Windows.h>
-#include <Winbase.h>
+#include <io.h>
+#include <windows.h>
+#include <winbase.h>
 #elif defined(__APPLE__) && defined(APPLE_PRE_10_3)
 #include <mach-o/dyld.h>
 #else // all other unix

src/osgDB/FileUtils.cpp

@@ -16,9 +16,9 @@
 // for now, the above include is commented out, and the below code takes precedence.
 
 #if defined(WIN32) && !defined(__CYGWIN__)
-    #include <Io.h>
-    #include <Windows.h>
-    #include <Winbase.h>
+    #include <io.h>
+    #include <windows.h>
+    #include <winbase.h>
     #include <sys/types.h>
     #include <sys/stat.h>
     #include <direct.h> // for _mkdir

src/osgPlugins/cfg/CameraConfig.cpp

@@ -16,9 +16,9 @@
 #include <osg/io_utils>
 
 #if defined(WIN32) && !defined(__CYGWIN__)
-    #include <Io.h>
-    #include <Windows.h>
-    #include <Winbase.h>
+    #include <io.h>
+    #include <windows.h>
+    #include <winbase.h>
     // set up for windows so acts just like unix access().
     #define F_OK 4
 #else // unix

src/osgPlugins/net/sockstream.h

@@ -48,7 +48,7 @@
 #  define SOCKET_ERROR -1
 #else
 #  include <windows.h>
-#  include <Wininet.h>
+#  include <wininet.h>
 //#  include <errno.h>
 #ifdef _MSC_VER 
 #  pragma comment(lib, "Wininet")