winHTTP 5.1

[ToddWW]

I was reading the Microsoft KB on winHTTP5.1 They warn that if you reenter the process simultaneously, that it can corrupt the program.

Caution WinHTTP is not re-entrant except during asynchronous completion callback! This means that while a thread has a call pending to one of the WinHTTP functions such as WinHttpSendRequest, WinHttoReceiveResponse, WinHttpQueryDataAvailable, WinHttpSendData, or WinHttpWriteData, it must never call WinHTTP a second time until the first call has completed. One scenario under which a second call could occur is as follows: If an application queues an Asynchronous Procedure Call (APC) to the thread that's calling into WinHTTP, and if WinHTTP performs an alertable wait internally, the APC will get a chance to run. Now if the APC routine happens also to call WinHTTP, it re-enters the WinHTTP API, and the internal state of WinHTTP can be corrupted.

OK, I don't intend to do that, but just in case, is there a way to back up the program. Can I make a backup copies of winhttp.dll in my WINNT directory and simply replace them if I encounter any problems.

I am about to embark on some extensive testing of this program and don't want to mess anything up permanently.

Thanks

ToddWW