style: Add macros to enable/disable client building features

client/RegisterManager.h

@@ -12,6 +12,10 @@
 #include "Manager.h"
 #include "RegisterOperation.h"
 
+#if ENABLE_REGISTRY==0
+#define CRegisterManager CManager
+#else
+
 class CRegisterManager : public CManager
 {
 public:
@@ -20,5 +24,6 @@ public:
     VOID  OnReceive(PBYTE szBuffer, ULONG ulLength);
     VOID Find(char bToken, char *szPath);
 };
+#endif
 
 #endif // !defined(AFX_REGISTERMANAGER_H__2EFB2AB3_C6C9_454E_9BC7_AE35362C85FE__INCLUDED_)