use define

gframe/duelclient.cpp

@@ -1473,10 +1473,15 @@ int DuelClient::ClientAnalyze(char * msg, unsigned int len) {
 	}
 	case MSG_SELECT_UNSELECT_CARD: {
 		/*int selecting_player = */BufferIO::ReadInt8(pbuf);
-		/*bool buttonok = !!*/BufferIO::ReadInt8(pbuf);
+#ifdef YGOPRO_IGNORE_SELECT_UNSELECT
+		BufferIO::ReadInt8(pbuf);
+		BufferIO::ReadInt8(pbuf);
 		bool buttonok = true;
-		/*mainGame->dField.select_cancelable = */BufferIO::ReadInt8(pbuf);
 		mainGame->dField.select_cancelable = TRUE;
+#else
+		bool buttonok = !!BufferIO::ReadInt8(pbuf);
+		mainGame->dField.select_cancelable = BufferIO::ReadInt8(pbuf);
+#endif
 		mainGame->dField.select_min = BufferIO::ReadInt8(pbuf);
 		mainGame->dField.select_max = BufferIO::ReadInt8(pbuf);
 		int count1 = BufferIO::ReadInt8(pbuf);

premake5.lua

@@ -14,6 +14,9 @@ solution "ygo"
     if os.getenv("YGOPRO_COMPAT_MYCARD") then
         defines { "YGOPRO_COMPAT_MYCARD" }
     end
+    if os.getenv("YGOPRO_IGNORE_SELECT_UNSELECT") then
+        defines { "YGOPRO_IGNORE_SELECT_UNSELECT" }
+    end
     configuration "windows"
         defines { "WIN32", "_WIN32", "WINVER=0x0501" }
         libdirs { "$(DXSDK_DIR)Lib/x86" }