exception handling for another program, is it possible in c#?

[Cptkli]

For example, if i VirtualProtectEx portion of memory of another program, with page guard or no access, how can i handle the exception when it will be raised, and get exception informations like registers value ect...? I think to handle the exception my program would require enabled debug privileges which i know how to code but then i don't know how to set a top level exception filter. I am still learning so any help would be great. :)

[Dave Kreskowiak]

Cptkli wrote:

For example, if i VirtualProtectEx portion of memory of another program, with page guard or no access, how can i handle the exception when it will be raised, and get exception informations like registers value ect...?

You can't. Your code will never see the exception. This would require a technique called ".DLL Injection", which is something that C# alone cannot do because of the .DLL library requirements of the technique. This is a very advanced technique. Not something for beginners to try and pull off.

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Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
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[Cptkli]

But i did read it's possible to replace the exception handler of a program without injecting any code with the SetUnhandledExceptionFilter api. It replaces the existing top-level exception filter of the targeted program. Is it wrong?