Use "#ifdef _WIN32" to detect Windows environment

diff --git a/include/libhpcs.h b/include/libhpcs.h
index c54fde9d2e22a329c60fa137a8954e91581635ce..07a28582828be8a4cdeee41c531bbf7d357a5fcf 100644 (file)
--- a/include/libhpcs.h
+++ b/include/libhpcs.h
@@ -5,7 +5,7 @@ extern "C" {
 #include <stddef.h>
 #include <stdint.h>
 
-#ifdef __WIN32__
+#ifdef _WIN32
 #define LIBHPCS_API __declspec(dllexport)
 #define LIBHPCS_CC __cdecl
 #else