Cheat Engine

[False Prophet]

I am injecting a dll into a process, but when I try to load it again it fails. I need to unload it but I have no idea how.
I am loading the DLL using createremotethread().

[atom0s]

There are a few ways you can unload it:

1. Call an exported function in the DLL. This is the more proper way to allow the DLL to properly cleanup and exit gracefully. You can tell the DLL to unload by using FreeLibraryAndExitThread.
http://msdn.microsoft.com/en-us/library/windows/desktop/ms683153%28v=vs.85%29.aspx

2. Force the DLL to unload using FreeLibrary. You can call it the same way you are injecting with CreateRemoteThread.
http://msdn.microsoft.com/en-us/library/windows/desktop/ms683152%28v=vs.85%29.aspx

[False Prophet]

Using FreeLibraryAndExitThread() method and still can't inject any dll afterwards.

[atom0s]

[Luetta97]

Hi I've been developing an application which injects a dll via Win32 hook globally.
It had worked fine on Windows XP and its lower versions, but once I tested it in Vista the program just crashed.
To be detail, it wasn't the apllication but the process to which the dll had been injected which the crash occured with the following error info.
I've removed unnecessary information for your convenience.

Problem Event Name: BEX
Application Name: msgmsgr.exe
Fault Module Name: xxx.dll_unloaded. (xxx.dll is the dll I've made and injected)

So, why does this happen on Vista?
I've searched the web and all it says is to delete the dll file.
But this is not the solution for me, since I'm the one actually developing & deploying the file.
Does anyone have an idea which can help me out solve this problem?

[atom0s]

Without more information there isn't much we can do to help you.

What does your DLL do?
What does it hook?
Care to post the code so we can see if its a common mistake?