General WinInet asynchronous mode questions

[t***@gmail.com]

Hello,
I'm a newbie to WinInet and am writing a wrapper class to work with
asynchronous mode.
After some research (it seems like WinInet api isn't documented too
well) I have some open questions:

1. When working with WinInet in asynchronous mode, is there a limit (or
recommended limit) to how many concurrent calls I should make to
HttpSendRequest?

2. When calling HttpOpenRequest (in async mode), I pass a custom
context object which I later reference in the "StatusCallBack"
function (status code INTERNET_STATUS_REQUEST_COMPLETE) - is it safe
to assume that the context object manipulation can be done without
taking any thread safety precautions?

3. If a call to HttpSendRequest times-out, what notification will I get
in "StatusCallBack"?

Thanks!

[Vladimir Scherbina]

Hi!

Post by t***@gmail.com
1. When working with WinInet in asynchronous mode, is there a limit (or
recommended limit) to how many concurrent calls I should make to
HttpSendRequest?

There is no such a limit.

Post by t***@gmail.com
2. When calling HttpOpenRequest (in async mode), I pass a custom
context object which I later reference in the "StatusCallBack"
function (status code INTERNET_STATUS_REQUEST_COMPLETE) - is it safe
to assume that the context object manipulation can be done without
taking any thread safety precautions?

You should care about synchronization of the object you pass to callback.

Post by t***@gmail.com
3. If a call to HttpSendRequest times-out, what notification will I get
in "StatusCallBack"?

http://www.codeproject.com/internet/asyncwininet.asp?df=100&forumid=1409&exp=0&select=838836