applied patch for ports/win32 Visual C++ build from Peter Gsellmann:

Use relative search-path instead of absolute ones
 Let you compile also the release configuration
 Insert file dcc.c into project
 define TSM_ENABLED in project settings
 reduce warnings
 Insert missing variable I_Am_Request

bacnet-stack/ports/win32/main.c

@@ -47,6 +47,7 @@ static uint8_t Rx_Buf[MAX_MPDU] = { 0 };
 
 /* send a whois to see who is on the network */
 static bool Who_Is_Request = true;
+bool I_Am_Request = true;
 
 static void Read_Properties(void)
 {