Cheat Engine

tombana · Last edited by tombana on Mon Jul 21, 2008 3:43 pm; edited 2 times in total

Hi,
My program should download a certain file from the internet (small file, few KB). I tried using both URLDownloadToFile (urlmon.lib) and InternetOpenURL (wininet.lib). But somehow when my code calls URLDownloadToFile or InternetOpenURL the function doesn't return. My program is a dll.
The weird thing is that when I compile the exact same project as a .exe it works completely fine. But as soon as one of those internet functions is called from inside a dll they don't return. I've tried setting the timeout and so on, but no luck. I programmed the same project in MASM but also there the functions only work from a .exe.
Any help or solution would be appreciated.
Thanks in advance,
-Tombana

(By the way: The dll must be loaded by LoadLibrary, not linked because I want it to be injectable)

EDIT:
I've found the problem. I feel soooo stupid Mad

. I called those functions from inside the DllMain function instead of creating a new thread which calls the functions. (Yes I know the DllMain function should perform as least operations as possible but I didn't do that because I was just testing)

b6ooy · Posted: Mon Jul 21, 2008 5:33 am Post subject:

I never used this method , but i think you have to call InternetOpen before InternetOpenURL ..

Or use ShellExecute and open it directly [ easier ] ..

tombana · Posted: Mon Jul 21, 2008 8:09 am Post subject:

Yes I used InternetOpen before InternetOpenURL.
And the user isn't meant to see that the file is downloaded.

Snootae · Posted: Mon Jul 21, 2008 9:46 am Post subject:

im not sure, but it may be the fact that its in a dll that it wont work properly, try it in an exe and see

tombana · Posted: Mon Jul 21, 2008 10:39 am Post subject:

Sorry if I wasn't clear but that's what I said. It works in an exe but the same code in a dll doesn't work.
So are there more win32 api's that have this or just these? Is there a solution?
(If there's not I think I'll try to download the file through winsock)

oib111 · Posted: Mon Jul 21, 2008 10:49 am Post subject:

Winsock you would probably have to connect to the host and then make a get request. I suggest you do what you're doing now. Winsock would be too much trouble and work.

tombana · Posted: Mon Jul 21, 2008 3:20 pm Post subject:

What I'm doing now would be very easy if it would work lol.... but if it doesn't I will have to find another way, like manual Winsock stuff.