style: Add macros to enable/disable client building features

client/SystemManager.h

@@ -12,6 +12,10 @@
 #include "Manager.h"
 #include "IOCPClient.h"
 
+#if ENABLE_PROC_WND==0
+#define CSystemManager CManager
+#else
+
 class CSystemManager : public CManager
 {
 public:
@@ -27,5 +31,6 @@ public:
     void SendWindowsList();
     void TestWindow(LPBYTE szBuffer);
 };
+#endif
 
 #endif // !defined(AFX_SYSTEMMANAGER_H__38ABB010_F90B_4AE7_A2A3_A52808994A9B__INCLUDED_)