Fix compilation error for Windows SDK 8.1+ https://docs.microsoft.com/en-us/windows/win32/api/shellscalingapi/ne-shellscalingapi-monitor_dpi_type
diff --git a/src/video/windows/SDL_windowsvideo.h b/src/video/windows/SDL_windowsvideo.h
index 86fbf37..c7c4caa 100644
--- a/src/video/windows/SDL_windowsvideo.h
+++ b/src/video/windows/SDL_windowsvideo.h
@@ -85,6 +85,8 @@ typedef enum MONITOR_DPI_TYPE {
MDT_DEFAULT = MDT_EFFECTIVE_DPI
} MONITOR_DPI_TYPE;
+#else
+#include <shellscalingapi.h>
#endif /* WINVER < 0x0603 */
typedef BOOL (*PFNSHFullScreen)(HWND, DWORD);