Upgrade to compile with WIN32_LEAN_AND_MEAN

Signed-off-by: Simon Rozman <simon@rozman.si>

include/WinStd/COM.h

@@ -39,6 +39,7 @@ namespace winstd
 
 #pragma once
 
+#include <unknwn.h>
 
 namespace winstd
 {

include/WinStd/Common.h

@@ -192,6 +192,12 @@ private:
 #endif
 
 
+#ifndef _LPCBYTE_DEFINED
+#define _LPCBYTE_DEFINED
+typedef const BYTE *LPCBYTE;
+#endif
+
+
 namespace winstd
 {
     /// \addtogroup WinStdStrFormat