# Trouble using windows includes with DWORD, INT **URL:** \ **Category:** C++\ **Tags:** compilation, windows, unreal-engine, CPP, question\ **Created:** [April 10, 2014, 12:23pm UTC](https://forums.unrealengine.com/t/trouble-using-windows-includes-with-dword-int/280190 "2014-04-10T12:23:50Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Nadege\_1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Nadege\_1](https://forums.unrealengine.com/u/Nadege_1)\ **Post date:** [April 10, 2014, 12:23pm UTC](https://forums.unrealengine.com/t/trouble-using-windows-includes-with-dword-int/280190/1 "2014-04-10T12:23:50Z")
Hello, I’m trying to use a static library that use some includes files of windows sdk (winsock2.h) but I get compilation errors about ambiguous symbols: DWORD and INT. I searched in the documentation and those symbols appears to be, in unreal, [typedef of “FUnusableClass”](https://docs.unrealengine.com/latest/INT/API/Runtime/Core/index.html). Why prevent the use of those symbols? Maybe we are not supposed to use Windows stuff directly and must use Unreal’s instead, [like here](https://answers.unrealengine.com/questions/4399/getting-my-documents-or-appdata-path.html)? What I’m trying to do is integrate a library we made, based on network library asio ([Asio C++ Library](http://think-async.com/Asio/)), in our unreal project. So what can/should i do? Nadège ---
**Author:** ![Jamie\_Dale](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jamie_dale/32/1165413_2.png) [@Jamie\_Dale](https://forums.unrealengine.com/u/Jamie_Dale)\ **Post date:** [April 10, 2014, 1:04pm UTC](https://forums.unrealengine.com/t/trouble-using-windows-includes-with-dword-int/280190/2 "2014-04-10T13:04:49Z")
Where we need access to the Windows types in engine, we wrap the include in: ``` #include "AllowWindowsPlatformTypes.h" #include "MyWindowsStuff.h" #include "HideWindowsPlatformTypes.h" ``` ---
**Author:** ![Nadege\_1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Nadege\_1](https://forums.unrealengine.com/u/Nadege_1)\ **Post date:** [April 10, 2014, 1:25pm UTC](https://forums.unrealengine.com/t/trouble-using-windows-includes-with-dword-int/280190/3 "2014-04-10T13:25:31Z")
nice thank you ! ---
**Author:** ![gao10211\_1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@gao10211\_1](https://forums.unrealengine.com/u/gao10211_1)\ **Post date:** [September 26, 2014, 8:53am UTC](https://forums.unrealengine.com/t/trouble-using-windows-includes-with-dword-int/280190/4 "2014-09-26T08:53:56Z")
Where is the MyWindowsStuff.h file? I insert the above code but the compile error that “no such or directory about the MyWindowsStuff.h” apeears. ---
**Author:** ![Ehamloptiran\_1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Ehamloptiran\_1](https://forums.unrealengine.com/u/Ehamloptiran_1)\ **Post date:** [September 26, 2014, 9:21am UTC](https://forums.unrealengine.com/t/trouble-using-windows-includes-with-dword-int/280190/5 "2014-09-26T09:21:37Z")
You dont actually include “MyWindowStuff.h” you substitute that for the headers that require windows platform types. So in your case the ffmpeg headers. ---
**Author:** ![gao10211\_1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@gao10211\_1](https://forums.unrealengine.com/u/gao10211_1)\ **Post date:** [September 26, 2014, 9:38am UTC](https://forums.unrealengine.com/t/trouble-using-windows-includes-with-dword-int/280190/6 "2014-09-26T09:38:54Z")
Hi. Thanks for your answer. I insert ffmpeg headers like this, but errors not disppear. ``` #include "AllowWindowsPlatformTypes.h" #include "ffmpeginc.h" #include "HideWindowsPlatformTypes.h" ``` there are follow souce code in ffmpeginc.h file ``` #pragma once #ifdef __cplusplus extern "C" { #include #include #include #include #include } #endif ``` -this is the error 1\>C:\Program Files (x86)\Windows Kits\8.1\include\shared\rpcasync.h(126): error C2872: ‘UINT’ : ambiguous symbol 1\> could be ‘C:\Program Files (x86)\Windows Kits\8.1\include\shared\minwindef.h(177) : unsigned int UINT’ 1\> or ‘C:\Program Files\Unreal Engine\4.4\Engine\Source\Runtime\Core\Public\Core.h(491) : DoNotUseOldUE4Type::UINT’ Please explain how can I fix it. ---
**Author:** ![anonymous\_user\_01dd28a6](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_01dd28a6](https://forums.unrealengine.com/u/anonymous_user_01dd28a6)\ **Post date:** [July 7, 2015, 8:28pm UTC](https://forums.unrealengine.com/t/trouble-using-windows-includes-with-dword-int/280190/7 "2015-07-07T20:28:42Z")
My Version… In my static blueprint utilities class. Also I use 2 static buffers for the data gets. in the .h ``` UFUNCTION(BlueprintCallable, Category = TheVoidUtils) static FString GetMachineIP(); ``` top of the .cpp ``` #include "AllowWindowsPlatformTypes.h" #include "winsock.h" #include "HideWindowsPlatformTypes.h" ``` in the .cpp ``` char VOIDIP_hostname[1024]; char VOIDIP_IPSTRING[1024]; FString UUnrealVoidUtils::GetMachineIP() { #ifdef WIN32 WSADATA wsaData; WORD wVersionRequested = MAKEWORD(2, 0); if (::WSAStartup(wVersionRequested, &wsaData) != 0) return FString(TEXT("NO WINSOCK")); #endif if (gethostname(VOIDIP_hostname, sizeof(VOIDIP_hostname)) == SOCKET_ERROR) { #ifdef WIN32 WSACleanup(); #endif return FString(TEXT("WINSOCK ERROR")); } struct hostent *host = gethostbyname(VOIDIP_hostname); if (host == NULL) { #ifdef WIN32 WSACleanup(); #endif return FString(TEXT("GET HOST ERROR")); } sprintf(VOIDIP_IPSTRING, "%d.%d.%d.%d", (int32)(((struct in_addr *)(host->h_addr))->S_un.S_un_b.s_b1), (int32)(((struct in_addr *)(host->h_addr))->S_un.S_un_b.s_b2), (int32)(((struct in_addr *)(host->h_addr))->S_un.S_un_b.s_b3), (int32)(((struct in_addr *)(host->h_addr))->S_un.S_un_b.s_b4)); #ifdef WIN32 WSACleanup(); #endif return FString(VOIDIP_IPSTRING); } ```