Build Error When Include Web Service in MFC application

[Shivanand Gupta]

Hi, I have MFC application and including a web service Then got many error. CCritical setion class is using in MFC project if i remove that class then problem may be solve. But i need that class. I have no idea how to solve this problem????

[Cedric Moonen]

shivanandgupta wrote:

Then got many error

What is the exact error message(s) ? You realize that your question is totally vague ?

Cédric Moonen Software developer
Charting control [v2.0] OpenGL game tutorial in C++

[Rajesh R Subramanian]

If you don't want to use the CCriticalSection class from MFC, try using the Win32 synchronization functions: EnterCriticalSection[^] LeaveCriticalSection[^]

It is a crappy thing, but it's life -^ Carlo Pallini

[Shivanand Gupta]

I get a lot of Compile time errors (C2872) CCriticalSection Ambiguous Symbol.

[Shivanand Gupta]

I get a lot of Compile time errors (C2872) CCriticalSection Ambiguous Symbol. I can not remove CCriticalSection Class.

[Cedric Moonen]

Are you redefining a CCriticalSection object somewhere in your own code ?

Cédric Moonen Software developer
Charting control [v2.0] OpenGL game tutorial in C++

[David Crow]

Are you including afxmt.h? Have you read this?

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

[mike4online]

I recently encountered this ambiguous symbol issue and found a solution. Posting here in this old thread for reference. I had the same issue in a project where I needed to include both <afxmt.h> and <atlsync.h>. They each have a similar set of concurrency classes with the same names -- but for a given class some of the member functions are distinct. In Visual Studio 2022 build 17.4.3 with the latest Windows 10 SDK (and perhaps in older IDEs and SDKs), you can reference classes from both of these headers without ambiguity, so long as you: 1) Include afxmt.h BEFORE including atlsync.h, e.g. `#include ` `#include ` 2) Do NOT specify using namespace ATL 3) To reference a class in atlsync.h, preface the class name with ATL::, e.g. ATL::CEvent or ATL::CSemaphore. If you do not add this ATL:: namespace preface, the class will be referenced from afxmt.h.